Senate Armed Services Committee member Sen. John McCain, R-Ariz., right, questions Defense Secretary Leon Panetta and Joint Chiefs Chairman Gen. Martin Dempsey, on Capitol Hill in Washington, Thursday, Feb. 7, 2013, during the committee's hearing about the Pentagon's role in responding to the attack last year on the U.S. consulate in Benghazi, Libya, where the ambassador and three other Americans were killed. The committee's ranking Republican Sen. James Inhofe, R-Okla. listens at left. (AP Photo/J. Scott Applewhite)

Associated Press
Senate Armed Services Committee member Sen. John McCain, R-Ariz., right, questions Defense Secretary Leon Panetta and Joint Chiefs Chairman Gen. Martin Dempsey, on Capitol Hill in Washington, Thursday, Feb. 7, 2013, during the committee's hearing about the Pentagon's role in responding to the attack last year on the U.S. consulate in Benghazi, Libya, where the ambassador and three other Americans were killed. The committee's ranking Republican Sen. James Inhofe, R-Okla. listens at left.   (AP Photo/J. Scott Applewhite)
Senate Armed Services Committee member Sen. John McCain, R-Ariz., right, questions Defense Secretary Leon Panetta and Joint Chiefs Chairman Gen. Martin Dempsey, on Capitol Hill in Washington, Thursday, Feb. 7, 2013, during the committee's hearing about the Pentagon's role in responding to the attack last year on the U.S. consulate in Benghazi, Libya, where the ambassador and three other Americans were killed. The committee's ranking Republican Sen. James Inhofe, R-Okla. listens at left. (AP Photo/J. Scott Applewhite)
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