ISS Expedition 40/41 backup crew members Terry Virts of NASA, left, and Samantha Cristoforetti of the European Space Agency at the Gagarin Cosmonaut Training Center May 15, 2014 in Star City, Russia.

- Image ID: E0KDDK
NASA Photo / Alamy Stock Photo
Image ID: E0KDDK
ISS Expedition 40/41 backup crew members Terry Virts of NASA, left, and Samantha Cristoforetti of the European Space Agency at the Gagarin Cosmonaut Training Center May 15, 2014 in Star City, Russia.
Location: Star City, Russia