U.S. President Barack Obama, U.S. Defense Secretary Chuck Hagel and Chairman of the Joint Chiefs of Staff Martin Dempsey stand during a ceremony in observance of the terrorist attacks of 9/11 at the Pentagon September 11, 2013 in Arlington, Virginia. Family members of the Pentagon attack victims and survivors of the attack gathered to hear from Obama and other leaders at the National 9/11 Pentagon Memorial near the place where terrorists drove a jetliner into the Department of Defense headquarters in 2001.
{"Image ImageDescription": "ARLINGTON, VA - SEPTEMBER 11:  11:  (L to R) U.S. President Barack Obama, U.S. Defense Secretary Chuck Hagel and Chairman of the Joint Chiefs of Staff Martin Dempsey stand during a ceremony in observance of the terrorist attacks of 9/11 at the Pentagon September 11, 2013 in Arlington, Virginia. Family members of the Pentagon attack victims and survivors of the attack gathered to hear from Obama and other leaders at the National 9/11 Pentagon Memorial near the place where terrorists drove a jetliner into the Department of Defense headquarters in 2001.  (Photo by Kevin Dietsch-Pool/Getty Images)", "Image Copyright": "2013 Getty Images"}