United States Senate Committee On Armed Services

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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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Defense Secretary Robert Gates, left, arrives on Capitol Hill in Washington Thursday, Dec. 2, 2010, to testify before the Senate Armed Services Committee hearing about the Don't Ask Don't Tell policy. Committee Chairman Sen. Carl Levin, D-Mich., is at center, the committee's ranking Republican Sen. John McCain, R-Ariz. is at right. (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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A report sits in front of the seat for Gen. Carter Ham, commander of the United States Army Europe and co-chairman of the Comprehensive Review Working Group, on Capitol Hill in Washington Thursday, Dec. 2, 2010. prior to 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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Senate Armed Services Committee Chairman Sen. Carl Levin, D-Mich., center, flanked by the the committee's ranking Republican Sen. John McCain, R-Ariz., right, and Sen. Joseph Lieberman, I-Conn., listens to testimony on Capitol Hill in Washington Thursday, Dec. 2, 2010, during the committee's hearing on the military Don't Ask Don't Tell policy. (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)

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Joint Chiefs Chairman Adm. Michael Mullen listens to testimony on Capitol Hill in Washington Thursday, Dec. 2, 2010, during the Senate Armed Services Committee's Don't Ask Don't Tell policy hearing. (AP Photo/Alex Brandon)

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Defense Secretary Robert M. Gates (left) arrives on Capitol Hill in Washington on Thursday, Dec. 2, 2010, to testify before the Senate Armed Services Committee about the "don't ask, don't tell" policy. Sen. Carl Levin, the committee chairman, is at center; the committee's ranking Republican, Sen. John McCain, is at right. (AP Photo/Alex Brandon)

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ASSOCIATED PRESS Energy Secretary Steven Chu (left), Secretary of State Hillary Rodham Clinton, Defense Secretary Robert M. Gates, and Joint Chiefs of Staff Chairman Adm. Mike Mullen testify on Capitol Hill in June at a Senate Armed Services Committee hearing on the New Strategic Arms Reduction Treaty.

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Sen. John McCain, R-Ariz., the ranking member of the Senate Armed Services Committee, walks on Capitol Hill in Washington Tuesday, Nov. 30, 2010, as committee staff members are receiving a briefing on the Armed Services Don't Ask Don't Tell survey. (AP Photo/Alex Brandon)

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Senate Armed Services Committee Chairman Sen. Carl Levin, D-Mich. walks on Capitol Hill in Washington Tuesday, Nov. 30, 2010, as the member's staff are receiving a briefing on the Armed Services Don't Ask Don't Tell survey. (AP Photo/Alex Brandon)

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US Marines Gen. James F. Amos testifies on Capitol Hill in Washington, Tuesday, Sept. 21, 2010, before the Senate Armed Services Committee hearing on his nomination for reappointment to the grade of general and the be Commandant of the Marine Corps. (AP Photo/Alex Brandon)

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Marine Gen. James Amos arrives on Capitol Hill in Washington on Tuesday, Sept. 21, 2010, to testify before the Senate Armed Services Committee on his nomination for reappointment to the grade of general and as commandant of the Marine Corps. (AP Photo/Alex Brandon)

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US Marines Gen. James F. Amos testifies on Capitol Hill in Washington, Tuesday, Sept. 21, 2010, before the Senate Armed Services Committee hearing on his nomination for reappointment to the grade of general and the be Commandant of the Marine Corps. (AP Photo/Alex Brandon)

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Senate Armed Services Committee Chairman Sen. Carl Levin, D-Mich., left, and the committee's ranking Republican Sen. John McCain, R-Ariz., right, listen as US Marines Gen. James F. Amos, back to camera, testifies on Capitol Hill in Washington, Tuesday, Sept. 21, 2010, before the committee's hearing on Amos' reappointment to the grade of general and the be Commandant of the Marine Corps. (AP Photo/Alex Brandon)

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Senate Armed Services Committee member Sen. Kay Hagan, D-N.C., stands next to US Marines Gen. James F. Amos in a waiting room on Capitol Hill in Washington, Tuesday, Sept. 21, 2010, prior to the start of the committee's hearing on Amos' reappointment to the grade of general and the be Commandant of the Marine Corps. (AP Photo/Alex Brandon)

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Marine Gen. James Mattis, named to head U.S. Central Command, arrives Tuesday on Capitol Hill to testify at a Senate Armed Services Committee hearing on his nomination. (Associated Press)

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U.S. Central Command Commander-nominee Marine Corps Gen. James Mattis, left, arrives on Capitol Hill in Washington, Tuesday, July 27, 2010, to testify before the Senate Armed Services Committee hearing on his nomination. (AP Photo/Alex Brandon)

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U.S. Central Command Commander-nominee Marine Corps Gen. James Mattis , right, is greeted on Capitol Hill in Washington, Tuesday, July 27, 2010, by Senate Armed Services Committee Sen. Carl Levin, D-Mich., prior to testifying before the committee's hearing on his nomination. (AP Photo/Alex Brandon)