Pentagon Memorial opens to public
First responders stand atop the Pentagon during the Pentagon Memorial dedication ceremony Sept. 11 at Alexandria, Va. They stood at the spot where American Airlines Flight 77 crashed into the building on Sept. 11, 2001, killing 59 people aboard the flight and 125 in the building. First responders are the firefighters, police officers and other rescue workers who were first on the scene that day. (Defense Department photo/Andy Morataya)