William gerstenmaier hi-res stock photography and images

William Gerstenmaier, associate administrator for the NASA Human Exploration and Operations Directorate, gives remarks during a Stock Photo

RME62FX9–William Gerstenmaier, associate administrator for the NASA Human Exploration and Operations Directorate, gives remarks during a

NASA Associate Administrator for Human Exploration and Operations William Gerstenmaier during a NASA town hall discussion plans to land astronauts on the Moon by 2024 at NASA Headquarters May 14, 2019 in Washington, DC. Stock Photo

RMT9THX8–NASA Associate Administrator for Human Exploration and Operations William Gerstenmaier during a NASA town hall discussion plans to land astronauts on the Moon by 2024 at NASA Headquarters May 14, 2019 in Washington, DC.

William Gerstenmaier, NASA Associate Administrator for Human Exploration and Operations is seen on the launch pad with the Soyuz MS-07 spacecraft, Sunday, Dec. 17, 2017 at the Baikonur Cosmodrome in Kazakhstan. Expedition 54 Soyuz Commander Anton Shkaplerov of Roscosmos, flight engineer Scott Tingle of NASA, and flight engineer Norishige Kanai of the Japan Aerospace Exploration Agency (JAXA) launched at 2:21 a.m. EST (1:21 p.m. Baikonur time) on Dec. 17 to begin a five month mission aboard the International Space Station. Photo Credit: (NASA/Joel Kowsky) Stock Photo

RMKYNF9Y–William Gerstenmaier, NASA Associate Administrator for Human Exploration and Operations is seen on the launch pad with the Soyuz MS-07 spacecraft, Sunday, Dec. 17, 2017 at the Baikonur Cosmodrome in Kazakhstan. Expedition 54 Soyuz Commander Anton Shkaplerov of Roscosmos, flight engineer Scott Tingle of NASA, and flight engineer Norishige Kanai of the Japan Aerospace Exploration Agency (JAXA) launched at 2:21 a.m. EST (1:21 p.m. Baikonur time) on Dec. 17 to begin a five month mission aboard the International Space Station. Photo Credit: (NASA/Joel Kowsky)

SpaceX CEO and Chief Designer Elon Musk, left, NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier, second from left, NASA International Space Station Program Manager Kirk Shireman, second from right, and SpaceX Director of Crew Mission Management Benji Reed, right, watch the progress of the Crew Dragon spacecraft after launch from firing room four at the Kennedy Space Center March 2, 2019 in Cape Canaveral, Florida. Stock Photo

RMRWYX0R–SpaceX CEO and Chief Designer Elon Musk, left, NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier, second from left, NASA International Space Station Program Manager Kirk Shireman, second from right, and SpaceX Director of Crew Mission Management Benji Reed, right, watch the progress of the Crew Dragon spacecraft after launch from firing room four at the Kennedy Space Center March 2, 2019 in Cape Canaveral, Florida.

William Gerstenmaier, associate administrator for the NASA Human Exploration and Operations Directorate, center, gives remarks d Stock Photo

RME62FXA–William Gerstenmaier, associate administrator for the NASA Human Exploration and Operations Directorate, center, gives remarks d

Kirk Shireman of NASA, ISS Program Manager, left, and William Gerstenmaier, NASA Associate Administrator for Human Exploration and Operations walk with NASA astronaut Kate Rubins as she prepares to board the Soyuz MS-01 spacecraft with Russian cosmonaut Anatoly Ivanishin of Roscosmos, and Japanese astronaut Takuya Onishi of the Japan Aerospace Exploration Agency (JAXA), Thursday, July 7, 2016 at the Baikonur Cosmodrome in Kazakhstan. Rubins, Ivanishin, and Onishi launched from the Baikonur Cosmodrome in Kazakhstan the morning of July 7, Kazakh time (July 6 Eastern time.) All three will spend Stock Photo

RMKRMN07–Kirk Shireman of NASA, ISS Program Manager, left, and William Gerstenmaier, NASA Associate Administrator for Human Exploration and Operations walk with NASA astronaut Kate Rubins as she prepares to board the Soyuz MS-01 spacecraft with Russian cosmonaut Anatoly Ivanishin of Roscosmos, and Japanese astronaut Takuya Onishi of the Japan Aerospace Exploration Agency (JAXA), Thursday, July 7, 2016 at the Baikonur Cosmodrome in Kazakhstan. Rubins, Ivanishin, and Onishi launched from the Baikonur Cosmodrome in Kazakhstan the morning of July 7, Kazakh time (July 6 Eastern time.) All three will spend

NASA Associate Administrator for Human Exploration William Gerstenmaier walk with astronaut Kate Rubins to the launch pad in preparation for launch July 7, 2016 at the Baikonur Cosmodrome in Kazakhstan. Rubens joins crew members Russian cosmonaut Anatoly Ivanishin and Japanese astronaut Takuya Onishi on four-month mission. Stock Photo

RMGCC1X7–NASA Associate Administrator for Human Exploration William Gerstenmaier walk with astronaut Kate Rubins to the launch pad in preparation for launch July 7, 2016 at the Baikonur Cosmodrome in Kazakhstan. Rubens joins crew members Russian cosmonaut Anatoly Ivanishin and Japanese astronaut Takuya Onishi on four-month mission.

Acting NASA Administrator Robert Lightfoot, along with acting NASA Deputy Administrator Lesa Roe, associate administrator for Human Exploration and Operations at NASA Headquarters William Gerstenmaier, associate administrator of NASA's Office of International and Interagency Relations Al Condes, are listen to director of Space Exploration Systems at Lockheed Martin Space Systems Company Guy Beutelschies during a visit to Lockheed Martin's Mission Support Area, Wednesday, April 5, 2017 at Lockheed Martin Space Systems in Littleton, Colo. The Mission Support Area supports six of NASA's robotic p Stock Photo

RMJ330FW–Acting NASA Administrator Robert Lightfoot, along with acting NASA Deputy Administrator Lesa Roe, associate administrator for Human Exploration and Operations at NASA Headquarters William Gerstenmaier, associate administrator of NASA's Office of International and Interagency Relations Al Condes, are listen to director of Space Exploration Systems at Lockheed Martin Space Systems Company Guy Beutelschies during a visit to Lockheed Martin's Mission Support Area, Wednesday, April 5, 2017 at Lockheed Martin Space Systems in Littleton, Colo. The Mission Support Area supports six of NASA's robotic p

Cape Canaveral, USA, 05th Dec, 2014. NASA Administrator Charles Bolden with Associate Administrator for Human Exploration and Operations Directorate William Gerstenmaier, and others in Building AE react as they watch the Orion spacecraft splash down in the Pacific Ocean on a monitor more than three hours after launching December 5, 2014 in Cape Canaveral, Florida. Credit: Planetpix/Alamy Live News Stock Photo

RMEBY9YH–Cape Canaveral, USA, 05th Dec, 2014. NASA Administrator Charles Bolden with Associate Administrator for Human Exploration and Operations Directorate William Gerstenmaier, and others in Building AE react as they watch the Orion spacecraft splash down in the Pacific Ocean on a monitor more than three hours after launching December 5, 2014 in Cape Canaveral, Florida. Credit: Planetpix/Alamy Live News

NASA Administrator Charles Bolden, right, Associate Administrator for Space Operations William Gerstenmaier, center, Associate Administrator Christopher Scolese, left, and other management look on from Firing Room Four of the Launch Control Center (LCC) as space shuttle Atlantis launches from pad 39A on Friday, July 8, 2011, in Cape Canaveral, Fla. The launch of Atlantis, STS-135, is the final flight of the shuttle program, a 12-day mission to the International Space Station. Photo Credit: (NASA/Bill Ingalls) NASA officials watch the final mission of the Space Shuttle Stock Photo

RMKRB170–NASA Administrator Charles Bolden, right, Associate Administrator for Space Operations William Gerstenmaier, center, Associate Administrator Christopher Scolese, left, and other management look on from Firing Room Four of the Launch Control Center (LCC) as space shuttle Atlantis launches from pad 39A on Friday, July 8, 2011, in Cape Canaveral, Fla. The launch of Atlantis, STS-135, is the final flight of the shuttle program, a 12-day mission to the International Space Station. Photo Credit: (NASA/Bill Ingalls) NASA officials watch the final mission of the Space Shuttle

U.S. Vice President Mike Pence, center, speaks with NASA Administrator Jim Bridenstine, left, during a meeting on the progress on Space Policy Directive 1 at NASA Headquarters December 12, 2018 in Washington, DC. Also joining the meeting are: NASA Deputy Administrator Jim Morhard, left, NASA Chief of Staff Janet Karika, NASA Associate Administrator Steve Jurczyk, Chief Financial Officer Jeff DeWit, Associate Administrator for Human Exploration and Operations William Gerstenmaier, and Associate Administrator for the Science Mission Directorate Thomas Zurbuchen, along with acting Chief of Staff Stock Photo

RMR8JKG7–U.S. Vice President Mike Pence, center, speaks with NASA Administrator Jim Bridenstine, left, during a meeting on the progress on Space Policy Directive 1 at NASA Headquarters December 12, 2018 in Washington, DC. Also joining the meeting are: NASA Deputy Administrator Jim Morhard, left, NASA Chief of Staff Janet Karika, NASA Associate Administrator Steve Jurczyk, Chief Financial Officer Jeff DeWit, Associate Administrator for Human Exploration and Operations William Gerstenmaier, and Associate Administrator for the Science Mission Directorate Thomas Zurbuchen, along with acting Chief of Staff

William Gerstenmaier, vice president for Build and Flight Reliability at SpaceX, left, and Richard Jones, manager of the Mission Management and Integration Office for NASA's Commercial Crew Program, monitor the countdown during a dress rehearsal in preparation for the launch of a SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft on NASA’s SpaceX Crew-3 mission with NASA astronauts Raja Chari, Tom Marshburn, Kayla Barron, and ESA (European Space Agency) astronaut Matthias Maurer onboard, Thursday, Oct. 28, 2021, in firing room four of the Launch Control Center at NASA’s Kenne Stock Photo

RM2HP67PG–William Gerstenmaier, vice president for Build and Flight Reliability at SpaceX, left, and Richard Jones, manager of the Mission Management and Integration Office for NASA's Commercial Crew Program, monitor the countdown during a dress rehearsal in preparation for the launch of a SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft on NASA’s SpaceX Crew-3 mission with NASA astronauts Raja Chari, Tom Marshburn, Kayla Barron, and ESA (European Space Agency) astronaut Matthias Maurer onboard, Thursday, Oct. 28, 2021, in firing room four of the Launch Control Center at NASA’s Kenne

NASA Administrator, Dr. Michael Griffin (right) and William Gerstenmaier, Associate Administrator for Space Operations inspect the Space Shuttle Discovery after the landing and conclusion of mission STS-121. The STS-121 crew of seven tested new equipment and procedures to improve shuttle safety, as well as deliver supplies and make repairs to the International Space Station. Photo Credit: 'NASA/Bill Ingalls' Michael Griffin inspecting Discovery after STS-121 Stock Photo

RMKRE7KY–NASA Administrator, Dr. Michael Griffin (right) and William Gerstenmaier, Associate Administrator for Space Operations inspect the Space Shuttle Discovery after the landing and conclusion of mission STS-121. The STS-121 crew of seven tested new equipment and procedures to improve shuttle safety, as well as deliver supplies and make repairs to the International Space Station. Photo Credit: 'NASA/Bill Ingalls' Michael Griffin inspecting Discovery after STS-121

William Gerstenmaier, associate administrator of NASA's Human Exploration and Operations Mission Directorate, participates via p Stock Photo

RME9TWNE–William Gerstenmaier, associate administrator of NASA's Human Exploration and Operations Mission Directorate, participates via p

KENNEDY SPACE CENTER, FLA. -- Ed White III touches his father's name engraved in the Space Mirror Memorial at the KSC Visitor Complex. White attended the ceremony held in remembrance of the astronauts lost in the Apollo 1 fire: Virgil 'Gus' Grissom, Edward H. White II and Roger B. Chaffee. Members of their families, along with KSC Director Bill Parsons, Associate Administrator for Space Operations William Gerstenmaier, President of the Astronauts Memorial Foundation Stephen Feldman and Chairman of the Board of Directors of the Astronauts Memorial Foundation William Potter, attended the cere Stock Photo

RMKRECX4–KENNEDY SPACE CENTER, FLA. -- Ed White III touches his father's name engraved in the Space Mirror Memorial at the KSC Visitor Complex. White attended the ceremony held in remembrance of the astronauts lost in the Apollo 1 fire: Virgil 'Gus' Grissom, Edward H. White II and Roger B. Chaffee. Members of their families, along with KSC Director Bill Parsons, Associate Administrator for Space Operations William Gerstenmaier, President of the Astronauts Memorial Foundation Stephen Feldman and Chairman of the Board of Directors of the Astronauts Memorial Foundation William Potter, attended the cere

William Gerstenmaier, associate administrator for the Human Exploration and Operations Directorate, NASA, speaks at the Humans to Mars Summit on Tuesday, May 5, 2015 at George Washington University in Washington, DC. Gerstenmaier was part of a leadership panel that spoke about NASA's path to human exploration of Mars. Stock Photo

RMEXGHNX–William Gerstenmaier, associate administrator for the Human Exploration and Operations Directorate, NASA, speaks at the Humans to Mars Summit on Tuesday, May 5, 2015 at George Washington University in Washington, DC. Gerstenmaier was part of a leadership panel that spoke about NASA's path to human exploration of Mars.

Baikonur, Kazakhstan. 11th October, 2018. Expedition 57 Flight Engineer Nick Hague of NASA, walks with NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier, center, and NASA Administrator Jim Bridenstine, right, prior to boarding the Soyuz MS-10 spacecraft for launch from the Baikonur Cosmodrome October 11, 2018 in Baikonur, Kazakhstan. Shortly after lift off the rocket malfunctioned en route to the International Space Station and aborted forcing an emergency landing in Kazakhstan. Credit: Planetpix/Alamy Live News Stock Photo

RMPTTFYP–Baikonur, Kazakhstan. 11th October, 2018. Expedition 57 Flight Engineer Nick Hague of NASA, walks with NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier, center, and NASA Administrator Jim Bridenstine, right, prior to boarding the Soyuz MS-10 spacecraft for launch from the Baikonur Cosmodrome October 11, 2018 in Baikonur, Kazakhstan. Shortly after lift off the rocket malfunctioned en route to the International Space Station and aborted forcing an emergency landing in Kazakhstan. Credit: Planetpix/Alamy Live News

NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier, right, escorts Expedition 56 flight engineer Serena Auñón-Chancellor as she prepares to board the Soyuz MS-09 spacecraft for launch, Wednesday, June 6, 2018 at the Baikonur Cosmodrome in Kazakhstan. Auñón-Chancellor and her crewmates Alexander Gerst of ESA (European Space Agency) and Sergey Prokopyev of Roscosmos will spend the next six months living and working aboard the International Space Station. Stock Photo

RMPG9K8K–NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier, right, escorts Expedition 56 flight engineer Serena Auñón-Chancellor as she prepares to board the Soyuz MS-09 spacecraft for launch, Wednesday, June 6, 2018 at the Baikonur Cosmodrome in Kazakhstan. Auñón-Chancellor and her crewmates Alexander Gerst of ESA (European Space Agency) and Sergey Prokopyev of Roscosmos will spend the next six months living and working aboard the International Space Station.

NASA Associate Administrator for Space Operations William Gerstenmaier monitors the countdown to the launch of the space shuttle Endeavour (STS-134) from Firing Room Four of the Launch Control Center (LCC), Monday, May 16, 2011, at Kennedy Space Center in Cape Canaveral, Fla. During the mission, Endeavour and the STS-134 crew will deliver the Alpha Magnetic Spectrometer (AMS) and spare parts including two S-band communications antennas, a high-pressure gas tank and additional spare parts for Dextre. Stock Photo

RM2WBNTY1–NASA Associate Administrator for Space Operations William Gerstenmaier monitors the countdown to the launch of the space shuttle Endeavour (STS-134) from Firing Room Four of the Launch Control Center (LCC), Monday, May 16, 2011, at Kennedy Space Center in Cape Canaveral, Fla. During the mission, Endeavour and the STS-134 crew will deliver the Alpha Magnetic Spectrometer (AMS) and spare parts including two S-band communications antennas, a high-pressure gas tank and additional spare parts for Dextre.

NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier speaks with the Soyuz MS-09 crew from the Moscow Mission Control Center in Korolev, Russia a few hours after the Soyuz MS-09 docked to the International Space Station on Friday, June 8, 2018. Hatches were opened at 11:17am EDT (6:17pm Moscow time) and Sergey Prokopyev of Roscosmos, Serena Auñón-Chancellor of NASA, and Alexander Gerst of ESA (European Space Agency) joined Expedition 56 Commander Drew Feustel of NASA, Ricky Arnold of NASA, and Oleg Artemyev of Roscosmos onboard the orbi Stock Photo

RMPG9KAX–NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier speaks with the Soyuz MS-09 crew from the Moscow Mission Control Center in Korolev, Russia a few hours after the Soyuz MS-09 docked to the International Space Station on Friday, June 8, 2018. Hatches were opened at 11:17am EDT (6:17pm Moscow time) and Sergey Prokopyev of Roscosmos, Serena Auñón-Chancellor of NASA, and Alexander Gerst of ESA (European Space Agency) joined Expedition 56 Commander Drew Feustel of NASA, Ricky Arnold of NASA, and Oleg Artemyev of Roscosmos onboard the orbi

NASA Administrator Michael Griffin (R) listens as William Gerstenmaier, Associate Administrator for space operations at NASA, testifies before a Space, Aeronautics, and Related Agencies Subcommittee hearing on the issues facing the U.S. space program after retirement of the space shuttle in Washington on November 15, 2007. (UPI Photo/Kevin Dietsch) Stock Photo

RMW0E1MT–NASA Administrator Michael Griffin (R) listens as William Gerstenmaier, Associate Administrator for space operations at NASA, testifies before a Space, Aeronautics, and Related Agencies Subcommittee hearing on the issues facing the U.S. space program after retirement of the space shuttle in Washington on November 15, 2007. (UPI Photo/Kevin Dietsch)

Las Vegas NV, USA. 12th Mar, 2015. William Gerstenmaier, NASA's associate administrator for Human Exploration and Operations USA, talks at a press conference Thursday about ''BEAM'' mission to the International Space Station.The BEAM is scheduled to launch in September this year aboard the eighth SpaceX cargo resupply mission to the station and be installed on the aft port of the station's Tranquility node. Photo by Gene Blevins/LA DailyNews Credit: Gene Blevins/ZUMA Wire/Alamy Live News Stock Photo

RMEHEH7A–Las Vegas NV, USA. 12th Mar, 2015. William Gerstenmaier, NASA's associate administrator for Human Exploration and Operations USA, talks at a press conference Thursday about ''BEAM'' mission to the International Space Station.The BEAM is scheduled to launch in September this year aboard the eighth SpaceX cargo resupply mission to the station and be installed on the aft port of the station's Tranquility node. Photo by Gene Blevins/LA DailyNews Credit: Gene Blevins/ZUMA Wire/Alamy Live News

Expedition 53 crewmembers Mark Vande Hei of NASA, left, Alexander Misurkin of Roscosmos, and Joe Acaba of NASA right, pose for a group photograph with Roscosmos and NASA management after arriving at the Soyuz launch pad ahead for their launch, Wednesday, Sept. 13, 2017, (Sept. 12, U.S. time). Acaba, Misurkin, and Vande Hei will spend approximately five and half months on the International Space Station. Photo Credit: (NASA/Bill Ingalls) Expedition 53 Soyuz Launch (NHQ201709130014) Stock Photo

RMKRNG5H–Expedition 53 crewmembers Mark Vande Hei of NASA, left, Alexander Misurkin of Roscosmos, and Joe Acaba of NASA right, pose for a group photograph with Roscosmos and NASA management after arriving at the Soyuz launch pad ahead for their launch, Wednesday, Sept. 13, 2017, (Sept. 12, U.S. time). Acaba, Misurkin, and Vande Hei will spend approximately five and half months on the International Space Station. Photo Credit: (NASA/Bill Ingalls) Expedition 53 Soyuz Launch (NHQ201709130014)

NASA Administrator Michael Griffin (foreground) watches the launch of the Space Shuttle Endeavour, to get STS-118 underway, from the Launch Control Center on August 8, 2007 at the Kennedy Space Center in Cape Canaveral, Fla. The shuttle lifted off from launch pad 39A at 6:36 p.m. (EDT). Behind and to the right of Administrator Griffin is William Gerstenmaier, NASA Associate Administrator for Space Operations. Stock Photo

RM2PR56F8–NASA Administrator Michael Griffin (foreground) watches the launch of the Space Shuttle Endeavour, to get STS-118 underway, from the Launch Control Center on August 8, 2007 at the Kennedy Space Center in Cape Canaveral, Fla. The shuttle lifted off from launch pad 39A at 6:36 p.m. (EDT). Behind and to the right of Administrator Griffin is William Gerstenmaier, NASA Associate Administrator for Space Operations.

RMEXGJGR–William Gerstenmaier, associate administrator for the Human Exploration and Operations Directorate, NASA, speaks at the Humans to Mars Summit on Tuesday, May 5, 2015 at George Washington University in Washington, DC. Gerstenmaier was part of a leadership panel that spoke about NASA's path to human exploration of Mars.

NASA Associate Administrator for Space Operations William Gerstenmaier points to one the monitors in Firing Room Four of the Launch Control Center (LCC) as NASA Administrator Charles Bolden, right, and other NASA managers look on during the launch of the space shuttle Endeavour (STS-134), Monday, May 16, 2011, at Kennedy Space Center in Cape Canaveral, Fla. During the mission, Endeavour and the STS-134 crew will deliver the Alpha Magnetic Spectrometer (AMS) and spare parts including two S-band communications antennas, a high-pressure gas tank and additional spare parts for Dextre. Stock Photo

RM2WBNNPR–NASA Associate Administrator for Space Operations William Gerstenmaier points to one the monitors in Firing Room Four of the Launch Control Center (LCC) as NASA Administrator Charles Bolden, right, and other NASA managers look on during the launch of the space shuttle Endeavour (STS-134), Monday, May 16, 2011, at Kennedy Space Center in Cape Canaveral, Fla. During the mission, Endeavour and the STS-134 crew will deliver the Alpha Magnetic Spectrometer (AMS) and spare parts including two S-band communications antennas, a high-pressure gas tank and additional spare parts for Dextre.

NASA Administrator Charles Bolden, left, NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier, and others in Building AE at Cape Canaveral Air Force Station, react as they watch the Orion spacecraft splash down in the Pacific Ocean a more than three hours after launching onboard a United Launch Alliance Delta IV Heavy rocket from Launch Complex 37, Friday, Dec. 5, 2014, Cape Canaveral, Florida. The Orion spacecraft orbited Earth twice, reaching an altitude of approximately 3,600 miles above Earth before landing. No one was aboard Orion for this Stock Photo

RM2WBNP92–NASA Administrator Charles Bolden, left, NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier, and others in Building AE at Cape Canaveral Air Force Station, react as they watch the Orion spacecraft splash down in the Pacific Ocean a more than three hours after launching onboard a United Launch Alliance Delta IV Heavy rocket from Launch Complex 37, Friday, Dec. 5, 2014, Cape Canaveral, Florida. The Orion spacecraft orbited Earth twice, reaching an altitude of approximately 3,600 miles above Earth before landing. No one was aboard Orion for this

William Gerstenmaier (L), Associate Administrator for space operations at NASA, NASA Administrator Michael Griffin (C) and Richard Gilbrech, associate administrator for NASA's Exploration Systems Mission Directorate, testify before a Space, Aeronautics, and Related Agencies Subcommittee hearing on the issues facing the U.S. space program after retirement of the space shuttle in Washington on November 15, 2007. (UPI Photo/Kevin Dietsch) Stock Photo

RMW0E1MN–William Gerstenmaier (L), Associate Administrator for space operations at NASA, NASA Administrator Michael Griffin (C) and Richard Gilbrech, associate administrator for NASA's Exploration Systems Mission Directorate, testify before a Space, Aeronautics, and Related Agencies Subcommittee hearing on the issues facing the U.S. space program after retirement of the space shuttle in Washington on November 15, 2007. (UPI Photo/Kevin Dietsch)

NASA Associate Administrator for Space Operations William Gerstenmaier, standing left, Manager, Space Shuttle Program Office John Shannon, standing right, and other management look on from Firing Room Four of the NASA Kennedy Space Center Launch Control Center (LCC) as they monitor the weather and countdown to the launch of the space shuttle Atlantis on Friday, July 8, 2011, in Cape Canaveral, Fla. The launch of Atlantis, STS-135, is the final flight of the shuttle program, a 12-day mission to the International Space Station. Stock Photo

RM2WBNTDY–NASA Associate Administrator for Space Operations William Gerstenmaier, standing left, Manager, Space Shuttle Program Office John Shannon, standing right, and other management look on from Firing Room Four of the NASA Kennedy Space Center Launch Control Center (LCC) as they monitor the weather and countdown to the launch of the space shuttle Atlantis on Friday, July 8, 2011, in Cape Canaveral, Fla. The launch of Atlantis, STS-135, is the final flight of the shuttle program, a 12-day mission to the International Space Station.

NASA Associate Administrator for Space Operations, William Gerstenmaier (L) and NASA Administrator Michael Griffin watch as the Space Shuttle Endeavour approaches at Kennedy Space Center on August 21, 2007. The shuttle landed a day early because of concerns over Hurricane Dean, concluding International Space Station construction and supply mission STS-118. ( UPI Photo/Bill Ingalls/NASA) Stock Photo

RMW0MB6A–NASA Associate Administrator for Space Operations, William Gerstenmaier (L) and NASA Administrator Michael Griffin watch as the Space Shuttle Endeavour approaches at Kennedy Space Center on August 21, 2007. The shuttle landed a day early because of concerns over Hurricane Dean, concluding International Space Station construction and supply mission STS-118. ( UPI Photo/Bill Ingalls/NASA)

The Orion team (including NASA Administrator Charles Bolden and Operations Directorate William Gerstenmaier) discuss Orion operations in Building AE at Cape Canaveral Air Force Station during Exploration Flight Test-1 (EFT-1) on Dec. 5, 2014. Part of Batch image transfer from Flickr. Stock Photo

RM2WBNDM2–The Orion team (including NASA Administrator Charles Bolden and Operations Directorate William Gerstenmaier) discuss Orion operations in Building AE at Cape Canaveral Air Force Station during Exploration Flight Test-1 (EFT-1) on Dec. 5, 2014. Part of Batch image transfer from Flickr.

Expedition 57 Flight Engineer Nick Hague of NASA his walks with NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier, center, and NASA Administrator Jim Bridenstine, right, prior to boarding the Soyuz MS-10 spacecraft for launch, on October 11, 2018, at the Baikonur Cosmodrome in Kazakhstan. Shortly after launch, an anomaly was detected with the booster and the launch ascent was aborted which resulted in a 'ballistic landing' of the capsule. Both men are alive and believed to be in good condition after being recovered by Search and Rescue teams Stock Photo

RMW0N3WE–Expedition 57 Flight Engineer Nick Hague of NASA his walks with NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier, center, and NASA Administrator Jim Bridenstine, right, prior to boarding the Soyuz MS-10 spacecraft for launch, on October 11, 2018, at the Baikonur Cosmodrome in Kazakhstan. Shortly after launch, an anomaly was detected with the booster and the launch ascent was aborted which resulted in a 'ballistic landing' of the capsule. Both men are alive and believed to be in good condition after being recovered by Search and Rescue teams

Las Vegas NV, USA. 12th Mar, 2015. William Gerstenmaier, NASA's associate administrator for Human Exploration and Operations USA(L) and Robert Bigelow, president and founder of Bigelow Aerospace talks at a press conference Thursday about BEAM mission to the International Space Station.The BEAM is scheduled to launch in September this year aboard the eighth SpaceX cargo resupply mission to the station and be installed on the aft port of the station's Tranquility node. Photo by Gene Blevins/LA DailyNews/ZUMAPRESS Credit: Gene Blevins/ZUMA Wire/Alamy Live News Stock Photo

RMEHEH7R–Las Vegas NV, USA. 12th Mar, 2015. William Gerstenmaier, NASA's associate administrator for Human Exploration and Operations USA(L) and Robert Bigelow, president and founder of Bigelow Aerospace talks at a press conference Thursday about BEAM mission to the International Space Station.The BEAM is scheduled to launch in September this year aboard the eighth SpaceX cargo resupply mission to the station and be installed on the aft port of the station's Tranquility node. Photo by Gene Blevins/LA DailyNews/ZUMAPRESS Credit: Gene Blevins/ZUMA Wire/Alamy Live News

RMTXXD86–NASA Administrator Charles Bolden, right, Associate Administrator for Space Operations William Gerstenmaier, center, Associate Administrator Christopher Scolese, left, and other management look on from Firing Room Four of the Launch Control Center (LCC) as space shuttle Atlantis launches from pad 39A on Friday, July 8, 2011, in Cape Canaveral, Fla. The launch of Atlantis, STS-135, is the final flight of the shuttle program, a 12-day mission to the International Space Station UPI/NASA/Bill Ingalls

RMW0N5YB–SpaceX CEO and Chief Designer Elon Musk, left, NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier, second from left, NASA International Space Station Program Manager Kirk Shireman, second from right, and SpaceX Director of Crew Mission Management Benji Reed, right, watch the progress of the Crew Dragon spacecraft after launch from firing room four of the Launch Control Center, on March 2, 2019, at the Kennedy Space Center in Florida. The Demo-1 mission will be the first launch of a commercially built and operated American spacecraft a

NASA Manager for Launch Integration, Leroy Cain, left, and NASA Associate Administrator for Space Operations, William H. Gerstenmaier, watch as the The Space Shuttle Atlantis (STS-122) lands at the Shuttle Landing Facility on Wednesday, February 20, 2008 at Kennedy Space Center, Florida. The shuttle completed delivery of the European Space Agency's (ESA) Columbus laboratory to the International Space Station. (UPI Photo/NASA/Bill Ingalls) Stock Photo

RMW0MBW9–NASA Manager for Launch Integration, Leroy Cain, left, and NASA Associate Administrator for Space Operations, William H. Gerstenmaier, watch as the The Space Shuttle Atlantis (STS-122) lands at the Shuttle Landing Facility on Wednesday, February 20, 2008 at Kennedy Space Center, Florida. The shuttle completed delivery of the European Space Agency's (ESA) Columbus laboratory to the International Space Station. (UPI Photo/NASA/Bill Ingalls)

William Gerstenmaier, associate administrator for the Human Exploration and Operations Directorate, NASA, answers an audience member's question at the Humans to Mars Summit on Tuesday, May 5, 2015 at George Washington University in Washington, DC. Gerstenmaier was part of a leadership panel that spoke about NASA's path to human exploration of Mars. Stock Photo

RMEXGJ1A–William Gerstenmaier, associate administrator for the Human Exploration and Operations Directorate, NASA, answers an audience member's question at the Humans to Mars Summit on Tuesday, May 5, 2015 at George Washington University in Washington, DC. Gerstenmaier was part of a leadership panel that spoke about NASA's path to human exploration of Mars.

The Orion team (including JSC Director Ellen Ochoa, NASA Administrator Charles Bolden and Operations Directorate William Gerstenmaier) discuss Orion operations in Building AE at Cape Canaveral Air Force Station during Exploration Flight Test-1 (EFT-1) on Dec. 5, 2014. Part of Batch image transfer from Flickr. Stock Photo

RM2WBNBEC–The Orion team (including JSC Director Ellen Ochoa, NASA Administrator Charles Bolden and Operations Directorate William Gerstenmaier) discuss Orion operations in Building AE at Cape Canaveral Air Force Station during Exploration Flight Test-1 (EFT-1) on Dec. 5, 2014. Part of Batch image transfer from Flickr.

RMEHEH7P–Las Vegas NV, USA. 12th Mar, 2015. William Gerstenmaier, NASA's associate administrator for Human Exploration and Operations USA(L) and Robert Bigelow, president and founder of Bigelow Aerospace talks at a press conference Thursday about BEAM mission to the International Space Station.The BEAM is scheduled to launch in September this year aboard the eighth SpaceX cargo resupply mission to the station and be installed on the aft port of the station's Tranquility node. Photo by Gene Blevins/LA DailyNews/ZUMAPRESS Credit: Gene Blevins/ZUMA Wire/Alamy Live News

A panel of NASA leadership including John Grunsfeld, left; William Gerstenmaier, center, and Steve Jurczyk, right, answers questions from the audience at the Humans to Mars Summit on Tuesday, May 5, 2015 at George Washington University in Washington, DC. The panel spoke about NASA's path to human exploration of Mars. Stock Photo

RMEXGJJ0–A panel of NASA leadership including John Grunsfeld, left; William Gerstenmaier, center, and Steve Jurczyk, right, answers questions from the audience at the Humans to Mars Summit on Tuesday, May 5, 2015 at George Washington University in Washington, DC. The panel spoke about NASA's path to human exploration of Mars.

The Orion team watches the flight in Building AE at Cape Canaveral Air Force Station during Exploration Flight Test-1 (EFT-1) on Dec. 5, 2014. NASA Administrator Charles Bolden, left, NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier, are in frame. Part of Batch image transfer from Flickr. Stock Photo

RM2WBNEN9–The Orion team watches the flight in Building AE at Cape Canaveral Air Force Station during Exploration Flight Test-1 (EFT-1) on Dec. 5, 2014. NASA Administrator Charles Bolden, left, NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier, are in frame. Part of Batch image transfer from Flickr.

RMEHEH88–Las Vegas NV, USA. 12th Mar, 2015. William Gerstenmaier, NASA's associate administrator for Human Exploration and Operations USA(L) and Robert Bigelow, president and founder of Bigelow Aerospace talks at a press conference Thursday about BEAM mission to the International Space Station.The BEAM is scheduled to launch in September this year aboard the eighth SpaceX cargo resupply mission to the station and be installed on the aft port of the station's Tranquility node. Photo by Gene Blevins/LA DailyNews/ZUMAPRESS Credit: Gene Blevins/ZUMA Wire/Alamy Live News

A panel of NASA leadership including John Grunsfeld, second from left; William Gerstenmaier, second from right; and Steve Jurczyk, right, answers questions by moderator Kent Rominger, vice president of strategy and business development, Orbital ATK, left, at the Humans to Mars Summit on Tuesday, May 5, 2015 at George Washington University in Washington, DC. The panel spoke about NASA's path to human exploration of Mars. Stock Photo

RMEXGJ2G–A panel of NASA leadership including John Grunsfeld, second from left; William Gerstenmaier, second from right; and Steve Jurczyk, right, answers questions by moderator Kent Rominger, vice president of strategy and business development, Orbital ATK, left, at the Humans to Mars Summit on Tuesday, May 5, 2015 at George Washington University in Washington, DC. The panel spoke about NASA's path to human exploration of Mars.

The Orion team celebrates Orion's successful Exploration Flight Test-1 (EFT-1) mission in Building AE at Cape Canaveral Air Force Station on Dec. 5, 2014. Orion Program Manager Mark Geyer, NASA Director Ellen Ochoa and NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier are in frame. The Orion spacecraft orbited Earth twice, reaching an altitude of approximately 3,600 miles above Earth before landing. No one was aboard Orion for this flight test, but the spacecraft is designed to allow us to journey to destinations never before visited by huma Stock Photo

RM2WBNB5M–The Orion team celebrates Orion's successful Exploration Flight Test-1 (EFT-1) mission in Building AE at Cape Canaveral Air Force Station on Dec. 5, 2014. Orion Program Manager Mark Geyer, NASA Director Ellen Ochoa and NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier are in frame. The Orion spacecraft orbited Earth twice, reaching an altitude of approximately 3,600 miles above Earth before landing. No one was aboard Orion for this flight test, but the spacecraft is designed to allow us to journey to destinations never before visited by huma

CAPE CANAVERAL, Fla. – Participating in a post-launch news conference in the Press Site auditorium at NASA’s Kennedy Space Center in Florida are, from left, George H. Diller, NASA Public Affairs, William Gerstenmaier, associate administrator of NASA’s Human Exploration and Operations Directorate, Alan Lindenmoyer, manager of NASA’s Commercial Crew and Cargo Program, and Gwynne Shotwell, president of SpaceX. The SpaceX Falcon 9 rocket launched into space at 3:44 a.m. EDT from Space Launch Complex-40 on Cape Canaveral Air Force Station in Florida. The launch is the company's second demonstratio Stock Photo

RM2WBN35B–CAPE CANAVERAL, Fla. – Participating in a post-launch news conference in the Press Site auditorium at NASA’s Kennedy Space Center in Florida are, from left, George H. Diller, NASA Public Affairs, William Gerstenmaier, associate administrator of NASA’s Human Exploration and Operations Directorate, Alan Lindenmoyer, manager of NASA’s Commercial Crew and Cargo Program, and Gwynne Shotwell, president of SpaceX. The SpaceX Falcon 9 rocket launched into space at 3:44 a.m. EDT from Space Launch Complex-40 on Cape Canaveral Air Force Station in Florida. The launch is the company's second demonstratio

RMEHEH84–Las Vegas NV, USA. 12th Mar, 2015. William Gerstenmaier, NASA's associate administrator for Human Exploration and Operations USA(L) and Robert Bigelow, president and founder of Bigelow Aerospace talks at a press conference Thursday about BEAM mission to the International Space Station.The BEAM is scheduled to launch in September this year aboard the eighth SpaceX cargo resupply mission to the station and be installed on the aft port of the station's Tranquility node. Photo by Gene Blevins/LA DailyNews/ZUMAPRESS Credit: Gene Blevins/ZUMA Wire/Alamy Live News

CAPE CANAVERAL, Fla. -- Associate Administrator for Human Exploration and Operations William Gerstenmaier speaks during the Day of Remembrance ceremony. Visible to the right is former NASA astronaut Jon McBride, chairman of the Astronauts Memorial Foundation board of directors. Space center Employees and guests gathered at the Space Mirror Memorial at the visitor complex for the annual event which took place on the 10th anniversary of the loss of the space shuttle Columbia and its crew. The ceremony also honored the astronauts of Apollo 1 and the shuttle Challenger. Dedicated in 1991, the name Stock Photo

RM2WBN980–CAPE CANAVERAL, Fla. -- Associate Administrator for Human Exploration and Operations William Gerstenmaier speaks during the Day of Remembrance ceremony. Visible to the right is former NASA astronaut Jon McBride, chairman of the Astronauts Memorial Foundation board of directors. Space center Employees and guests gathered at the Space Mirror Memorial at the visitor complex for the annual event which took place on the 10th anniversary of the loss of the space shuttle Columbia and its crew. The ceremony also honored the astronauts of Apollo 1 and the shuttle Challenger. Dedicated in 1991, the name

Steve Jurczyk, associate administrator of the Space Technology Mission Directorate, NASA, right, speaks on a panel with John Grunsfeld, associate administrator for the science mission directorate, NASA, second from left, and William Gerstenmaier, associate administrator for the Human Exploration and Operations Directorate, NASA, second from right, at the Humans to Mars Summit on Tuesday, May 5, 2015 at George Washington University in Washington, DC. The panel spoke about NASA's path to human exploration of Mars. Stock Photo

RMEXGJ3K–Steve Jurczyk, associate administrator of the Space Technology Mission Directorate, NASA, right, speaks on a panel with John Grunsfeld, associate administrator for the science mission directorate, NASA, second from left, and William Gerstenmaier, associate administrator for the Human Exploration and Operations Directorate, NASA, second from right, at the Humans to Mars Summit on Tuesday, May 5, 2015 at George Washington University in Washington, DC. The panel spoke about NASA's path to human exploration of Mars.

William Gerstenmaier, NASA Associate Administrator for Human Exploration and Operations, left, and NASA Deputy Administrator Dava Newman speak with Expedition 49 flight engineer Shane Kimbrough of NASA, Soyuz commander Sergey Ryzhikov of Roscosmos, and flight engineer Andrey Borisenko after they finished pressure checks of their Russian Sokol suits in preparation for launch to the International Space Station, Wednesday, Oct. 19, 2016 at the Baikonur Cosmodrome in Kazakhstan. Kimbrough, Ryzhikov and Borisenko of Roscosmos are scheduled to launch on Oct. 19 aboard the Soyuz MS-02 spacecraft. Vic Stock Photo

RMHF844R–William Gerstenmaier, NASA Associate Administrator for Human Exploration and Operations, left, and NASA Deputy Administrator Dava Newman speak with Expedition 49 flight engineer Shane Kimbrough of NASA, Soyuz commander Sergey Ryzhikov of Roscosmos, and flight engineer Andrey Borisenko after they finished pressure checks of their Russian Sokol suits in preparation for launch to the International Space Station, Wednesday, Oct. 19, 2016 at the Baikonur Cosmodrome in Kazakhstan. Kimbrough, Ryzhikov and Borisenko of Roscosmos are scheduled to launch on Oct. 19 aboard the Soyuz MS-02 spacecraft. Vic

RMEC30CX–NASA Administrator Charles Bolden, left, NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier, and others in Building AE at Cape Canaveral Air Force Station, react as they watch the Orion spacecraft splash down in the Pacific Ocean a more than three hours after launching onboard a United Launch Alliance Delta IV Heavy rocket from Launch Complex 37, Friday, Dec. 5, 2014, Cape Canaveral, Florida. The Orion spacecraft orbited Earth twice, reaching an altitude of approximately 3,600 miles above Earth before landing. No one was aboard Orion for this

Expedition 59 Post Docking Press Conference NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier answers questions during a Expedition 59 post-docking press conference, Friday, March 15, 2019 at the Baikonur Hotel in Baikonur, Kazakhstan. Stock Photo

RM2BP2YHW–Expedition 59 Post Docking Press Conference NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier answers questions during a Expedition 59 post-docking press conference, Friday, March 15, 2019 at the Baikonur Hotel in Baikonur, Kazakhstan.

RMEHEH87–Las Vegas NV, USA. 12th Mar, 2015. William Gerstenmaier, NASA's associate administrator for Human Exploration and Operations USA(L) and Robert Bigelow, president and founder of Bigelow Aerospace talks at a press conference Thursday about BEAM mission to the International Space Station.The BEAM is scheduled to launch in September this year aboard the eighth SpaceX cargo resupply mission to the station and be installed on the aft port of the station's Tranquility node. Photo by Gene Blevins/LA DailyNews/ZUMAPRESS Credit: Gene Blevins/ZUMA Wire/Alamy Live News

CAPE CANAVERAL, Fla. -- A wreath was placed at the Space Mirror Memorial by Sandra Anderson, widow of Columbia payload commander Michael Anderson, left, and Evelyn Husband-Thompson, widow of STS-107 commander Rick Husband. They were aided by NASA Associate Administrator Robert Lightfoot, partially obscured by Husband-Thompson, and Associate Administrator for Human Exploration and Operations William Gerstenmaier. Standing at the microphone, on the right, is former NASA astronaut Jon McBride, chairman of the Astronauts Memorial Foundation board of directors. Space center Employees and guests gat Stock Photo

RM2WBN8ER–CAPE CANAVERAL, Fla. -- A wreath was placed at the Space Mirror Memorial by Sandra Anderson, widow of Columbia payload commander Michael Anderson, left, and Evelyn Husband-Thompson, widow of STS-107 commander Rick Husband. They were aided by NASA Associate Administrator Robert Lightfoot, partially obscured by Husband-Thompson, and Associate Administrator for Human Exploration and Operations William Gerstenmaier. Standing at the microphone, on the right, is former NASA astronaut Jon McBride, chairman of the Astronauts Memorial Foundation board of directors. Space center Employees and guests gat

RM2BP2YK1–Expedition 59 Post Docking Press Conference NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier answers questions during a Expedition 59 post-docking press conference, Friday, March 15, 2019 at the Baikonur Hotel in Baikonur, Kazakhstan.

RMEHEH7T–Las Vegas NV, USA. 12th Mar, 2015. William Gerstenmaier, NASA's associate administrator for Human Exploration and Operations USA(L) and Robert Bigelow, president and founder of Bigelow Aerospace talks at a press conference Thursday about BEAM mission to the International Space Station.The BEAM is scheduled to launch in September this year aboard the eighth SpaceX cargo resupply mission to the station and be installed on the aft port of the station's Tranquility node. Photo by Gene Blevins/LA DailyNews/ZUMAPRESS Credit: Gene Blevins/ZUMA Wire/Alamy Live News

Expedition 59 Post Docking Press Conference Roscosmos Director General Dmitry Rogozin, left, and NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier answer questions during a Expedition 59 post-docking press conference, Friday, March 15, 2019 at the Baikonur Hotel in Baikonur, Kazakhstan. Stock Photo

RM2BP2YJ3–Expedition 59 Post Docking Press Conference Roscosmos Director General Dmitry Rogozin, left, and NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier answer questions during a Expedition 59 post-docking press conference, Friday, March 15, 2019 at the Baikonur Hotel in Baikonur, Kazakhstan.

AIAA NASA 60th Anniversary Reception NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier speaks during a reception hosted by the American Institute of Aeronautics and Astronautics (AIAA) to celebrate NASA's 60th anniversary, Thursday, Sept. 20, 2018 at the Ronald Reagan Building and International Trade Center in Washington, DC. Stock Photo

RM2BP2NB4–AIAA NASA 60th Anniversary Reception NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier speaks during a reception hosted by the American Institute of Aeronautics and Astronautics (AIAA) to celebrate NASA's 60th anniversary, Thursday, Sept. 20, 2018 at the Ronald Reagan Building and International Trade Center in Washington, DC.

RM2BP2N9Y–AIAA NASA 60th Anniversary Reception NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier speaks during a reception hosted by the American Institute of Aeronautics and Astronautics (AIAA) to celebrate NASA's 60th anniversary, Thursday, Sept. 20, 2018 at the Ronald Reagan Building and International Trade Center in Washington, DC.

Town Hall on FY20 Budget Amendment NASA Associate Administrator for Human Exploration and Operations William Gerstenmaier is seen during a NASA town hall on the amendment to the fiscal year 2020 budget request that supports the agency’s plan to land astronauts on the Moon by 2024, Tuesday, May 14, 2019 at NASA Headquarters in Washington, DC. Stock Photo

RM2BP31H8–Town Hall on FY20 Budget Amendment NASA Associate Administrator for Human Exploration and Operations William Gerstenmaier is seen during a NASA town hall on the amendment to the fiscal year 2020 budget request that supports the agency’s plan to land astronauts on the Moon by 2024, Tuesday, May 14, 2019 at NASA Headquarters in Washington, DC.

Expedition 59 Post Docking Press Conference Roscosmos Director of Human Spaceflight Programs Sergei Krikalev, Roscosmos Director General Dmitry Rogozin, and NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier answer questions during a Expedition 59 post-docking press conference, Friday, March 15, 2019 at the Baikonur Hotel in Baikonur, Kazakhstan. Stock Photo

RM2BP2YJN–Expedition 59 Post Docking Press Conference Roscosmos Director of Human Spaceflight Programs Sergei Krikalev, Roscosmos Director General Dmitry Rogozin, and NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier answer questions during a Expedition 59 post-docking press conference, Friday, March 15, 2019 at the Baikonur Hotel in Baikonur, Kazakhstan.

House Subcommittee on Space Hearing NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier testifies during a House Subcommittee on Space hearing titled "60 Years of NASA Leadership in Human Space Exploration: Past, Present, and Future," Wednesday, Sept. 26, 2018 at the Rayburn House Office Building in Washington. Stock Photo

RM2BP2N76–House Subcommittee on Space Hearing NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier testifies during a House Subcommittee on Space hearing titled "60 Years of NASA Leadership in Human Space Exploration: Past, Present, and Future," Wednesday, Sept. 26, 2018 at the Rayburn House Office Building in Washington.

RM2BP2N6X–House Subcommittee on Space Hearing NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier, is seen during a House Subcommittee on Space hearing titled "60 Years of NASA Leadership in Human Space Exploration: Past, Present, and Future," Wednesday, Sept. 26, 2018 at the Rayburn House Office Building in Washington.

RM2BP2NCA–House Subcommittee on Space Hearing NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier testifies during a House Subcommittee on Space hearing titled "60 Years of NASA Leadership in Human Space Exploration: Past, Present, and Future," Wednesday, Sept. 26, 2018 at the Rayburn House Office Building in Washington.

Hearing on Lunar And Deep Space Exploration NASA Associate Administrator, Human Exploration and Operations William Gerstenmaier testifies during the House Subcommittee on Space and Aeronautics hearing titled "Keeping our sights on Mars: A Review of NASA's Deep Space Exploration Programs and Lunar Proposal", Wednesday, May 8, 2019 at the Rayburn House Office Building in Washington. Stock Photo

RM2BP31BP–Hearing on Lunar And Deep Space Exploration NASA Associate Administrator, Human Exploration and Operations William Gerstenmaier testifies during the House Subcommittee on Space and Aeronautics hearing titled "Keeping our sights on Mars: A Review of NASA's Deep Space Exploration Programs and Lunar Proposal", Wednesday, May 8, 2019 at the Rayburn House Office Building in Washington.

RM2BP31AT–Hearing on Lunar And Deep Space Exploration NASA Associate Administrator, Human Exploration and Operations William Gerstenmaier testifies during the House Subcommittee on Space and Aeronautics hearing titled "Keeping our sights on Mars: A Review of NASA's Deep Space Exploration Programs and Lunar Proposal", Wednesday, May 8, 2019 at the Rayburn House Office Building in Washington.

RM2BP31AG–Hearing on Lunar And Deep Space Exploration NASA Associate Administrator, Human Exploration and Operations William Gerstenmaier testifies during the House Subcommittee on Space and Aeronautics hearing titled "Keeping our sights on Mars: A Review of NASA's Deep Space Exploration Programs and Lunar Proposal", Wednesday, May 8, 2019 at the Rayburn House Office Building in Washington.

House Committee on Science, Space, and Technology Hearing NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier testifies during a House Committee on Science, Space, and Technology hearing titled "America's Human Presence in Low-Earth Orbit" on Thursday, May 17, 2018 in the Rayburn House Office Building in Washington. Stock Photo

RM2BP3BC6–House Committee on Science, Space, and Technology Hearing NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier testifies during a House Committee on Science, Space, and Technology hearing titled "America's Human Presence in Low-Earth Orbit" on Thursday, May 17, 2018 in the Rayburn House Office Building in Washington.

RM2BP3BA8–House Committee on Science, Space, and Technology Hearing NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier testifies during a House Committee on Science, Space, and Technology hearing titled "America's Human Presence in Low-Earth Orbit" on Thursday, May 17, 2018 in the Rayburn House Office Building in Washington.

RM2BP3BAR–House Committee on Science, Space, and Technology Hearing NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier is seen prior to the start of a House Committee on Science, Space, and Technology Hearing titles "America's Human Presence in Low-Earth Orbit" on Thursday, May 17, 2018 in the Rayburn House Office Building in Washington.

RM2BP3BC9–House Committee on Science, Space, and Technology Hearing NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier testifies during a House Committee on Science, Space, and Technology hearing titled "America's Human Presence in Low-Earth Orbit" on Thursday, May 17, 2018 in the Rayburn House Office Building in Washington.

RM2BP3BCJ–House Committee on Science, Space, and Technology Hearing NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier testifies during a House Committee on Science, Space, and Technology hearing titled "America's Human Presence in Low-Earth Orbit" on Thursday, May 17, 2018 in the Rayburn House Office Building in Washington.

RM2BP3BCM–House Committee on Science, Space, and Technology Hearing NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier testifies during a House Committee on Science, Space, and Technology hearing titled "America's Human Presence in Low-Earth Orbit" on Thursday, May 17, 2018 in the Rayburn House Office Building in Washington.

Expedition 59 Post Docking Press Conference Roscosmos Director of Human Spaceflight Programs Sergei Krikalev, left, Roscosmos Director General Dmitry Rogozin, center, and NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier answer questions during a Expedition 59 post-docking press conference, Friday, March 15, 2019 at the Baikonur Hotel in Baikonur, Kazakhstan. Stock Photo

RM2BP2YJ1–Expedition 59 Post Docking Press Conference Roscosmos Director of Human Spaceflight Programs Sergei Krikalev, left, Roscosmos Director General Dmitry Rogozin, center, and NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier answer questions during a Expedition 59 post-docking press conference, Friday, March 15, 2019 at the Baikonur Hotel in Baikonur, Kazakhstan.

Senate Subcommittee on Space, Science, and Competitiveness Hearing NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier testifies during a Senate Subcommittee on Space, Science, and Competitiveness hearing titled "Examining the Future of the International Space Station: Administration Perspectives" held on Wednesday, May 16, 2018 in the Russell Senate Office Building on Capitol Hill in Washington. Stock Photo

RM2BP3BAT–Senate Subcommittee on Space, Science, and Competitiveness Hearing NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier testifies during a Senate Subcommittee on Space, Science, and Competitiveness hearing titled "Examining the Future of the International Space Station: Administration Perspectives" held on Wednesday, May 16, 2018 in the Russell Senate Office Building on Capitol Hill in Washington.

RM2BP3BAC–Senate Subcommittee on Space, Science, and Competitiveness Hearing NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier testifies during a Senate Subcommittee on Space, Science, and Competitiveness hearing titled "Examining the Future of the International Space Station: Administration Perspectives" held on Wednesday, May 16, 2018 in the Russell Senate Office Building on Capitol Hill in Washington.

RM2BP3BAN–Senate Subcommittee on Space, Science, and Competitiveness Hearing NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier testifies during a Senate Subcommittee on Space, Science, and Competitiveness hearing titled "Examining the Future of the International Space Station: Administration Perspectives" held on Wednesday, May 16, 2018 in the Russell Senate Office Building on Capitol Hill in Washington.

Hearing on Lunar And Deep Space Exploration NASA Associate Administrator, Human Exploration and Operations William Gerstenmaier, left, and NASA Special Assistant to the Administrator Mark Sirangelo, testify during the House Subcommittee on Space and Aeronautics hearing titled "Keeping our sights on Mars: A Review of NASA's Deep Space Exploration Programs and Lunar Proposal", Wednesday, May 8, 2019 at the Rayburn House Office Building in Washington. Stock Photo

RM2BP31AE–Hearing on Lunar And Deep Space Exploration NASA Associate Administrator, Human Exploration and Operations William Gerstenmaier, left, and NASA Special Assistant to the Administrator Mark Sirangelo, testify during the House Subcommittee on Space and Aeronautics hearing titled "Keeping our sights on Mars: A Review of NASA's Deep Space Exploration Programs and Lunar Proposal", Wednesday, May 8, 2019 at the Rayburn House Office Building in Washington.

Industry Forum on Lunar Exploration Plans NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier speaks at the opening of an industry forum on the agency's lunar exploration plans, Thursday, Feb. 14, 2019 at NASA Headquarters in Washington. The agency will work with industry to study and refine the approach to landing on the Moon, which includes a system of three separate elements that will provide astronauts transportation, landing, and safe return. Stock Photo

RM2BP2XA1–Industry Forum on Lunar Exploration Plans NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier speaks at the opening of an industry forum on the agency's lunar exploration plans, Thursday, Feb. 14, 2019 at NASA Headquarters in Washington. The agency will work with industry to study and refine the approach to landing on the Moon, which includes a system of three separate elements that will provide astronauts transportation, landing, and safe return.

RM2BP2X9Y–Industry Forum on Lunar Exploration Plans NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier speaks at the opening of an industry forum on the agency's lunar exploration plans, Thursday, Feb. 14, 2019 at NASA Headquarters in Washington. The agency will work with industry to study and refine the approach to landing on the Moon, which includes a system of three separate elements that will provide astronauts transportation, landing, and safe return.

RM2BP2XAP–Industry Forum on Lunar Exploration Plans NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier speaks at the opening of an industry forum on the agency's lunar exploration plans, Thursday, Feb. 14, 2019 at NASA Headquarters in Washington. The agency will work with industry to study and refine the approach to landing on the Moon, which includes a system of three separate elements that will provide astronauts transportation, landing, and safe return.

RM2BP31BF–Hearing on Lunar And Deep Space Exploration NASA Associate Administrator, Human Exploration and Operations William Gerstenmaier, left, and NASA Special Assistant to the Administrator Mark Sirangelo, watch as a video is played during the House Subcommittee on Space and Aeronautics hearing titled "Keeping our sights on Mars: A Review of NASA's Deep Space Exploration Programs and Lunar Proposal", Wednesday, May 8, 2019 at the Rayburn House Office Building in Washington.

International Space Station Commercial Opportunities NASA Public Affairs Officer Stephanie Schierholz, standing left, moderates a media briefing with NASA Chief Financial Officer Jeff DeWit, left, NASA International Space Station Deputy Director Robyn Gatens, center, and NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier where they announced the agency’s five-part plan to open the International Space Station to expanded commercial and marketing activities and private astronaut missions to the station and enable additional commercial destinat Stock Photo

RM2BP3251–International Space Station Commercial Opportunities NASA Public Affairs Officer Stephanie Schierholz, standing left, moderates a media briefing with NASA Chief Financial Officer Jeff DeWit, left, NASA International Space Station Deputy Director Robyn Gatens, center, and NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier where they announced the agency’s five-part plan to open the International Space Station to expanded commercial and marketing activities and private astronaut missions to the station and enable additional commercial destinat

Expedition 57 Crew Farewell Expedition 57 Flight Engineer Nick Hague of NASA his walks with NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier, center, and NASA Administrator Jim Bridenstine, right, prior to boarding the Soyuz MS-10 spacecraft for launch, Thursday, Oct. 11, 2018 at the Baikonur Cosmodrome in Kazakhstan. Hague and Expedition 57 Flight Engineer Alexey Ovchinin of Roscosmos will spend the next six months living and working aboard the International Space Station. Stock Photo

RM2BP2PHH–Expedition 57 Crew Farewell Expedition 57 Flight Engineer Nick Hague of NASA his walks with NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier, center, and NASA Administrator Jim Bridenstine, right, prior to boarding the Soyuz MS-10 spacecraft for launch, Thursday, Oct. 11, 2018 at the Baikonur Cosmodrome in Kazakhstan. Hague and Expedition 57 Flight Engineer Alexey Ovchinin of Roscosmos will spend the next six months living and working aboard the International Space Station.

Hearing on Lunar And Deep Space Exploration NASA Associate Administrator, Human Exploration and Operations William Gerstenmaier, left, NASA Associate Administrator for Legislative Affairs Suzanne Gillen, center, and NASA Special Assistant to the Administrator Mark Sirangelo, confer prior to the start of the House Subcommittee on Space and Aeronautics hearing titled "Keeping our sights on Mars: A Review of NASA's Deep Space Exploration Programs and Lunar Proposal", Wednesday, May 8, 2019 at the Rayburn House Office Building in Washington. Stock Photo

RM2BP31AW–Hearing on Lunar And Deep Space Exploration NASA Associate Administrator, Human Exploration and Operations William Gerstenmaier, left, NASA Associate Administrator for Legislative Affairs Suzanne Gillen, center, and NASA Special Assistant to the Administrator Mark Sirangelo, confer prior to the start of the House Subcommittee on Space and Aeronautics hearing titled "Keeping our sights on Mars: A Review of NASA's Deep Space Exploration Programs and Lunar Proposal", Wednesday, May 8, 2019 at the Rayburn House Office Building in Washington.

Expedition 56 Preflight NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier, right, escorts Expedition 56 flight engineer Serena Auñón-Chancellor as she prepares to board the Soyuz MS-09 spacecraft for launch, Wednesday, June 6, 2018 at the Baikonur Cosmodrome in Kazakhstan. Auñón-Chancellor and her crewmates Alexander Gerst of ESA (European Space Agency) and Sergey Prokopyev of Roscosmos will spend the next six months living and working aboard the International Space Station. Stock Photo

RM2BP2K7R–Expedition 56 Preflight NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier, right, escorts Expedition 56 flight engineer Serena Auñón-Chancellor as she prepares to board the Soyuz MS-09 spacecraft for launch, Wednesday, June 6, 2018 at the Baikonur Cosmodrome in Kazakhstan. Auñón-Chancellor and her crewmates Alexander Gerst of ESA (European Space Agency) and Sergey Prokopyev of Roscosmos will spend the next six months living and working aboard the International Space Station.

Hearing on Lunar And Deep Space Exploration Portraits of past House Science and Technology Committee Chairmen, Sherwood Boehlert, left, and Ralph Hall are seen as NASA Associate Administrator, Human Exploration and Operations William Gerstenmaier testifies during a House Subcommittee on Space and Aeronautics hearing titled "Keeping our sights on Mars: A Review of NASA's Deep Space Exploration Programs and Lunar Proposal", Wednesday, May 8, 2019 at the Rayburn House Office Building in Washington. Stock Photo

RM2BP31B7–Hearing on Lunar And Deep Space Exploration Portraits of past House Science and Technology Committee Chairmen, Sherwood Boehlert, left, and Ralph Hall are seen as NASA Associate Administrator, Human Exploration and Operations William Gerstenmaier testifies during a House Subcommittee on Space and Aeronautics hearing titled "Keeping our sights on Mars: A Review of NASA's Deep Space Exploration Programs and Lunar Proposal", Wednesday, May 8, 2019 at the Rayburn House Office Building in Washington.

Expedition 58 Post-Docking Press Conference Dmitry Rogozin, the head of Roscosmos, discusses the successful launch and docking of the Expedition 58 crew to the International Space Station during a post-docking news conference with NASA’s Associate Administrator for Human Exploration Operations, William Gerstenmaier, and Sylvain Laporte, president, Canadian Space Agency (CSA), Dec. 4 in Baikonur, Kazakhstan. At the news conference, Rogozin announced that NASA astronaut Nick Hague and Roscosmos cosmonaut Alexey Ovchinin, who were involved in the abort of their first launch Oct. 11, would be ref Stock Photo

RM2BP2TW6–Expedition 58 Post-Docking Press Conference Dmitry Rogozin, the head of Roscosmos, discusses the successful launch and docking of the Expedition 58 crew to the International Space Station during a post-docking news conference with NASA’s Associate Administrator for Human Exploration Operations, William Gerstenmaier, and Sylvain Laporte, president, Canadian Space Agency (CSA), Dec. 4 in Baikonur, Kazakhstan. At the news conference, Rogozin announced that NASA astronaut Nick Hague and Roscosmos cosmonaut Alexey Ovchinin, who were involved in the abort of their first launch Oct. 11, would be ref

Expedition 58 Post-Docking Press Conference Dmitry Rogozin, the head of Roscosmos, center, discusses the successful launch and docking of the Expedition 58 crew to the International Space Station during a post-docking news conference with NASA’s Associate Administrator for Human Exploration Operations, William Gerstenmaier, left of Rogozin, and Sylvain Laporte, president, Canadian Space Agency (CSA), right of Rogozin, Dec. 4 in Baikonur, Kazakhstan. At the news conference, Rogozin announced that NASA astronaut Nick Hague and Roscosmos cosmonaut Alexey Ovchinin, who were involved in the abort Stock Photo

RM2BP2TW9–Expedition 58 Post-Docking Press Conference Dmitry Rogozin, the head of Roscosmos, center, discusses the successful launch and docking of the Expedition 58 crew to the International Space Station during a post-docking news conference with NASA’s Associate Administrator for Human Exploration Operations, William Gerstenmaier, left of Rogozin, and Sylvain Laporte, president, Canadian Space Agency (CSA), right of Rogozin, Dec. 4 in Baikonur, Kazakhstan. At the news conference, Rogozin announced that NASA astronaut Nick Hague and Roscosmos cosmonaut Alexey Ovchinin, who were involved in the abort

International Space Station Commercial Opportunities NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier gives remarks during a briefing where NASA announced the agency’s five-part plan to open the International Space Station to expanded commercial and marketing activities and private astronaut missions to the station and enable additional commercial destinations in low-Earth orbit, Friday, June 7, 2019 at the Nasdaq MarketSite in New York City. NASA will continue to maintain human presence and research in low-Earth orbit, and the long-term g Stock Photo

RM2BP324G–International Space Station Commercial Opportunities NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier gives remarks during a briefing where NASA announced the agency’s five-part plan to open the International Space Station to expanded commercial and marketing activities and private astronaut missions to the station and enable additional commercial destinations in low-Earth orbit, Friday, June 7, 2019 at the Nasdaq MarketSite in New York City. NASA will continue to maintain human presence and research in low-Earth orbit, and the long-term g

RM2BP3250–International Space Station Commercial Opportunities NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier, left, NASA Chief Financial Officer Jeff DeWit, center, and NASA International Space Station Deputy Director Robyn Gatens announce the agency’s five-part plan to open the International Space Station to expanded commercial and marketing activities and private astronaut missions to the station and enable additional commercial destinations in low-Earth orbit, Friday, June 7, 2019 at the Nasdaq MarketSite in New York City. NASA will continue t

RM2BP3BAY–House Committee on Science, Space, and Technology Hearing NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier, left, Dr. Bhavya Lal, a researcher at the Institute for Defense Analysis's Science and Technology Policy Institute, center, and Dr. Elizabeth Cantwell, chief executive officer at the Arizona State University Research Enterprise, right, listen as Rep. Brian Babin, R-Texas, is seen on screen as he delivers an opening statement during a House Committee on Science, Space, and Technology hearing titled "America's Human Prese

RM2BP3BC8–House Committee on Science, Space, and Technology Hearing NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier, left, Dr. Bhavya Lal, a researcher at the Institute for Defense Analysis's Science and Technology Policy Institute, center, and Dr. Elizabeth Cantwell, chief executive officer at the Arizona State University Research Enterprise, right, listen as Rep. Brian Babin, R-Texas, is seen on screen as he delivers an opening statement during a House Committee on Science, Space, and Technology hearing titled "America's Human Prese

Hearing on Lunar And Deep Space Exploration NASA Associate Administrator, Human Exploration and Operations William Gerstenmaier, left, NASA Special Assistant to the Administrator Mark Sirangelo, Director, Cornell Center for Astrophysics and Planetary Science, Co-Chair of the Former Committee on Human Spaceflight, National Academies of Sciences, Engineering, and Medicine Dr. Jonathan Lunine, Chair, Aerospace Safety Advisory Panel Dr. Patricia Sanders, and, President, Faulconer Consulting Group, LLC Mr. Walt Faulconer, right, are seen during a House Subcommittee on Space and Aeronautics hearing Stock Photo

RM2BP31AM–Hearing on Lunar And Deep Space Exploration NASA Associate Administrator, Human Exploration and Operations William Gerstenmaier, left, NASA Special Assistant to the Administrator Mark Sirangelo, Director, Cornell Center for Astrophysics and Planetary Science, Co-Chair of the Former Committee on Human Spaceflight, National Academies of Sciences, Engineering, and Medicine Dr. Jonathan Lunine, Chair, Aerospace Safety Advisory Panel Dr. Patricia Sanders, and, President, Faulconer Consulting Group, LLC Mr. Walt Faulconer, right, are seen during a House Subcommittee on Space and Aeronautics hearing

Town Hall on FY20 Budget Amendment NASA Administrator Jim Bridenstine, left, NASA Associate Administrator for Human Exploration and Operations William Gerstenmaier, second from left, acting Associate Administrator for NASA's Space Technology Mission Directorate, second from right, acting Associate Administrator for NASA's Science Mission Directorate Thomas Zurbuchen, right, are seen during a NASA town hall on the amendment to the fiscal year 2020 budget request that supports the agency’s plan to land astronauts on the Moon by 2024, Tuesday, May 14, 2019 at NASA Headquarters in Washington, DC. Stock Photo

RM2BP31HX–Town Hall on FY20 Budget Amendment NASA Administrator Jim Bridenstine, left, NASA Associate Administrator for Human Exploration and Operations William Gerstenmaier, second from left, acting Associate Administrator for NASA's Space Technology Mission Directorate, second from right, acting Associate Administrator for NASA's Science Mission Directorate Thomas Zurbuchen, right, are seen during a NASA town hall on the amendment to the fiscal year 2020 budget request that supports the agency’s plan to land astronauts on the Moon by 2024, Tuesday, May 14, 2019 at NASA Headquarters in Washington, DC.

RM2BP31HD–Town Hall on FY20 Budget Amendment NASA Administrator Jim Bridenstine, left, NASA Associate Administrator for Human Exploration and Operations William Gerstenmaier, second from left, acting Associate Administrator for NASA's Space Technology Mission Directorate, second from right, acting Associate Administrator for NASA's Science Mission Directorate Thomas Zurbuchen, right, are seen as they answer questions during a NASA town hall on the amendment to the fiscal year 2020 budget request that supports the agency’s plan to land astronauts on the Moon by 2024, Tuesday, May 14, 2019 at NASA Headqu

RM2BP31J1–Town Hall on FY20 Budget Amendment NASA Administrator Jim Bridenstine, left, NASA Associate Administrator for Human Exploration and Operations William Gerstenmaier, second from left, acting Associate Administrator for NASA's Space Technology Mission Directorate, second from right, acting Associate Administrator for NASA's Science Mission Directorate Thomas Zurbuchen, right, are seen during a NASA town hall on the amendment to the fiscal year 2020 budget request that supports the agency’s plan to land astronauts on the Moon by 2024, Tuesday, May 14, 2019 at NASA Headquarters in Washington, DC.

RM2BP31HJ–Town Hall on FY20 Budget Amendment NASA Administrator Jim Bridenstine, left, NASA Associate Administrator for Human Exploration and Operations William Gerstenmaier, second from left, acting Associate Administrator for NASA's Space Technology Mission Directorate, second from right, acting Associate Administrator for NASA's Science Mission Directorate Thomas Zurbuchen, right, are seen during a NASA town hall on the amendment to the fiscal year 2020 budget request that supports the agency’s plan to land astronauts on the Moon by 2024, Tuesday, May 14, 2019 at NASA Headquarters in Washington, DC.

RM2BP31H9–Town Hall on FY20 Budget Amendment NASA Administrator Jim Bridenstine, left, NASA Associate Administrator for Human Exploration and Operations William Gerstenmaier, second from left, acting Associate Administrator for NASA's Space Technology Mission Directorate, second from right, acting Associate Administrator for NASA's Science Mission Directorate Thomas Zurbuchen, right, are seen during a NASA town hall on the amendment to the fiscal year 2020 budget request that supports the agency’s plan to land astronauts on the Moon by 2024, Tuesday, May 14, 2019 at NASA Headquarters in Washington, DC.

House Subcommittee on Space Hearing Jody Singer, Director of NASA's Marshall Space Flight Center, second from right, testifies during a House Subcommittee on Space hearing titled "60 Years of NASA Leadership in Human Space Exploration: Past, Present, and Future," Wednesday, Sept. 26, 2018 at the Rayburn House Office Building in Washington. NASA's Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier, left, Mark Geyer, Director of NASA's Johnson Space Center, second from left, and Robert Cabana, Director of NASA's Kennedy Space Cent Stock Photo

RM2BP2N9F–House Subcommittee on Space Hearing Jody Singer, Director of NASA's Marshall Space Flight Center, second from right, testifies during a House Subcommittee on Space hearing titled "60 Years of NASA Leadership in Human Space Exploration: Past, Present, and Future," Wednesday, Sept. 26, 2018 at the Rayburn House Office Building in Washington. NASA's Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier, left, Mark Geyer, Director of NASA's Johnson Space Center, second from left, and Robert Cabana, Director of NASA's Kennedy Space Cent

Expedition 56 Soyuz Docking NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier speaks with the Soyuz MS-09 crew from the Moscow Mission Control Center in Korolev, Russia a few hours after the Soyuz MS-09 docked to the International Space Station on Friday, June 8, 2018. Hatches were opened at 11:17am EDT (6:17pm Moscow time) and Sergey Prokopyev of Roscosmos, Serena Auñón-Chancellor of NASA, and Alexander Gerst of ESA (European Space Agency) joined Expedition 56 Commander Drew Feustel of NASA, Ricky Arnold of NASA, and Oleg Artemyev Stock Photo

RM2BP2KAP–Expedition 56 Soyuz Docking NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier speaks with the Soyuz MS-09 crew from the Moscow Mission Control Center in Korolev, Russia a few hours after the Soyuz MS-09 docked to the International Space Station on Friday, June 8, 2018. Hatches were opened at 11:17am EDT (6:17pm Moscow time) and Sergey Prokopyev of Roscosmos, Serena Auñón-Chancellor of NASA, and Alexander Gerst of ESA (European Space Agency) joined Expedition 56 Commander Drew Feustel of NASA, Ricky Arnold of NASA, and Oleg Artemyev

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