Joint Chiefs Of Staff

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From left, Supreme Court Justice Elena Kagan, Joint Chiefs Chairman Gen. Martin Dempsey and outgoing Defense Secretary Leon Panetta talk prior to President Barack Obama's State of the Union address during a joint session of Congress on Capitol Hill in Washington, Tuesday Feb. 12, 2013. (AP Photo/Charles Dharapak, Pool)

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Joint Chiefs Chairman Gen. Martin E. Dempsey (left), Secretary of State Hillary Rodham Clinton (center) and Defense Secretary Leon Panetta testify May 23, 2012, on Capitol Hill before the Senate Foreign Relations Committee hearing on the Law of the Sea Convention. (Associated Press)

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Army Gen. Martin Dempsey, the Joint Chiefs chairman, has ordered a review of U.S. military training material with the goal of purging allegedly anti-Islamic content, the online portal Danger Room reported Tuesday. (Associated Press)

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Defense Secretary Leon Panetta, accompanied by Joint Chiefs Chairman Gen. Martin Dempsey, testifies March 7, 2012, on Capitol Hill before the Senate Armed Services Committee on the crisis in Syria. (Associated Press)

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President Obama, joined by Defense Secretary Leon E. Panetta (third from left), Joint Chiefs Chairman Gen. Martin Dempsey (center) and various senior Defense Department and military officials, discusses the Defense Strategic Review and a military strategy that will include large defense cuts at the Pentagon on Thursday. (Associated Press)

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Defense Secretary Leon E. Panetta and Joint Chiefs Chairman Gen. Martin Dempsey arrive for a news conference at the Pentagon on Thursday. Mr. Panetta ordered new reviews into mismanagement at the military's national mortuary in Delaware. (Associated Press)

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Joint Chiefs Vice Chairman Gen. James E. Cartwright reportedly is President Obama's pick as next chairman, but the current chairman is said to oppose him. (Associated Press)

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Defense Secretary Robert Gates, right, talks with Joint Chiefs Chairman Adm. Michael Mullen on Capitol Hill in Washington on Wednesday, Feb. 16, 2011, as they testified before the House Armed Services Committee. (AP Photo/J. Scott Applewhite)

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Defense Secretary Robert M. Gates and Joint Chiefs Chairman Adm. Mike Mullen discuss the proposed defense budget, which calls for major personnel cuts, with reporters Thursday at the Pentagon. (Associated Press)

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President Barack Obama, followed by, from second from left, Gen. David Petraeus, Defense Secretary Robert Gates, Vice President Joe Biden, and Joint Chiefs Chairman Adm. Michael Mullen, walks to the Rose Garden of the White House in Washington, Wednesday, June 23, 2010, to announce that Petraeus would replace Gen. Stanley McChrystal. (AP Photo/Charles Dharapak)

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Defense Secretary Robert Gates, right, and Joint Chiefs Chairman Adm. Michael Mullen, take their seats on Capitol Hill in Washington Thursday, Dec. 2, 2010, prior to testifying before the Senate Armed Services Committee's Don't Ask Don't Tell policy hearing. (AP Photo/Alex Brandon)

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From left, Joint Chiefs Chairman Admiral Michael Mullen, Defense Secretary of Defense Robert Gates, Defense Department general counsel Jeh Johnson, Gen. Carter Ham, commander of the United States Army Europe and co-chairman of the Comprehensive Review Working Group, take their seats on Capitol Hill in Washington Thursday, Dec. 2, 2010, prior to testifying before the Senate Armed Services Committee's Don't Ask Don't Tell policy hearing. (AP Photo/Alex Brandon)

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Joint Chiefs Chairman Adm. Michael Mullen, left, accompanied by Defense Secretary Robert Gates, on Capitol Hill in Washington Thursday, Dec. 2, 2010, before the Senate Armed Services Committee's Don't Ask Don't Tell policy hearing. (AP Photo/Alex Brandon)

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From left, Joint Chiefs Chairman Adm. Michael Mullen, Defense Secretary Robert Gates, Defense Department general counsel Jeh Johnson, and Gen. Carter Ham, commander of the United States Army Europe and co-chairman of the Comprehensive Review Working Group, testify on Capitol Hill in Washington Thursday, Dec. 2, 2010, before the Senate Armed Services Committee's Don't Ask Don't Tell policy hearing. (AP Photo/Alex Brandon)