Defense Secretary Chuck Hagel makes remarks as President Barack Obama and Chairman of of the Joint Chiefs of Staff Gen. Martin Dempsey listen during the 12th anniversary commemoration of the 9/11 terrorist attacks at the Pentagon Memorial in Arlington, Virginia, USA on September 11, 2013. Nearly 3,000 people were killed in the attacks in New York, Washington and Shanksville, Pennsylvania. Photo by Pat Benic/UPI/Pool/ABACAPRESS.COM11/09/2013 - Arlington - Photo