President Barack Obama, Defense Secretary Leon Panetta, and Gen. Martin Dempsey, stand during the playing of Taps (September 11, 2012)

President Barack Obama, Defense Secretary Leon Panetta and Gen. Martin Dempsey, Chairman of the Joint Chiefs of Staff, stand during the playing of Taps during the September 11th Observance Ceremony at the Pentagon Memorial in Arlington, Va., Sept. 11, 2012. (Official White House Photo by Pete Souza)