Sept 11 Pennsylvania

Family and friends of the 40 passengers and crew of Flight 93 walk down a path that follows the flight path of Flight 93 after visiting a boulder, top rear center, that marks the crash site of Flight 93 at the Flight 93 National Memorial in Shanksville, Pa. after a Service of Remembrance Thursday, Sept. 11, 2014, the 13th anniversary of the September 11th terrorist attacks. (AP Photo/Gene J. Puskar)