** FILE ** Defense Secretary Leon Panetta speaks to reporters in Shanksville, Pa., on Sept. 10, 2012, after visiting the Flight 93 National Memorial ahead of the 11th anniversary of the 9/11 attacks. (Associated Press)

Photo by: Mandel Ngan

** FILE ** Defense Secretary Leon Panetta speaks to reporters in Shanksville, Pa., on Sept. 10, 2012, after visiting the Flight 93 National Memorial ahead of the 11th anniversary of the 9/11 attacks. (Associated Press)