The Flight 93 National Memorial In Shanksville, Pennsylvania

The Flight 93 National Memorial In Shanksville, Pennsylvania

President Barack Obama greets audience members after participate in a wreath laying ceremony at the Flight 93 National Memorial to commemorate the tenth anniversary of the 9/11 terrorist attacks, on September 11, 2011 in Shanksville, Pennsylvania. The Flight 93 Memorial honors the victims of United flight 93 which crashed in Shanksville after the passengers fought back against the hijackers. The plane, which was believed to be headed to a target in Washington, D.C. was downed in the field. UPI/Kevin Dietsch