Pentagon

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Defense Secretary Chuck Hagel speaks to service members and civilian employees at the Pentagon on Wednesday, Feb. 27, 2013, after being sworn in. (Associated Press)

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** FILE ** In this Feb. 13, 2013, file photo, Defense Secretary Leon Panetta speaks during his last news conference as defense secretary at the Pentagon in Washington. (AP Photo/Susan Walsh, File)

**FILE** Pentagon Comptroller Robert F. Hale listens as Secretary of Defense Robert Gates and Chairman of the Joint Chiefs of Staff Adm. Michael Mullen testify regarding the Department of Defense fiscal 2012 budget request before the Senate Appropriations Committee Subcommittee on Defense on Capitol Hill in Washington on June 15, 2011. (Associated Press)

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Sen. Lindsey Graham, South Carolina Republican, waits Feb. 12, 2013, on Capitol Hill to make a statement in opposition to President Obama's choice to run the Pentagon as the Senate Senate Armed Services Committee considers the nomination of former Sen. Chuck Hagel of Nebraska to be secretary of defense. (Associated Press)

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Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, testifies on Capitol Hill in Washington on Thursday, Feb. 7, 2013, before the Senate Armed Services Committee hearing on the Pentagon's role in responding to the attack last year on the U.S. Consulate in Benghazi, Libya. (AP Photo/J. Scott Applewhite)