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Outgoing Defense Secretary Leon Panetta, and Joint Chiefs Chairman Gen. Martin Dempsey, testify on Capitol Hill in Washington, Thursday, Feb. 7, 2013, before the Senate Armed Services Committee 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. (AP Photo/J. Scott Applewhite)

Associated Press
Outgoing Defense Secretary Leon Panetta, and  Joint Chiefs Chairman Gen. Martin Dempsey, testify on Capitol Hill in Washington, Thursday, Feb. 7, 2013, before the Senate Armed Services Committee 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.  (AP Photo/J. Scott Applewhite)
Outgoing Defense Secretary Leon Panetta, and Joint Chiefs Chairman Gen. Martin Dempsey, testify on Capitol Hill in Washington, Thursday, Feb. 7, 2013, before the Senate Armed Services Committee 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. (AP Photo/J. Scott Applewhite)
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