The Flight 93 National Memorial remembers those killed on United Airlines Flight 93 on September 11, 2001.

- Image ID: DNGGT0
The Flight 93 National Memorial remembers those killed on United Airlines Flight 93 on September 11, 2001.
Jim West / Alamy Stock Photo
Image ID: DNGGT0
Shanksville, Pennsylvania - The Flight 93 National Memorial. The memorial remembers those killed on United Airlines Flight 93, which crashed on September 11, 2001 after being taken over by hijackers. Forty groves of trees are being planted to honor the 33 passengers and seven crew.
Location: Shanksville, Pennsylvania USA