Chairman of the Joint Chiefs of Staff Adm. Mike Mullen (right) and Defense Secretary Leon Panetta testify before the Senate Armed Services Committee on Thursday. The Pentagon is tasked with cutting $450 billion from its budget in the next 10 years. Karen Bleier/AFP/Getty Images hide caption

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Afghan security personnel carry a wounded colleague across a street in Kabul on Sept. 14, after Taliban fighters attacked the most heavily protected part of the Afghan capital. Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, said Thursday before a Senate panel that the Haqqani network of militants, supported by Pakistan, was responsible for this attack, among others. ShahMarai /AFP/Getty Images hide caption

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Stacy Vasquez was discharged from the military under the "don't ask, don't tell" policy. Now that the ban has been lifted, she says she is applying to re-enter the military. Vasquez is seen here in 2010 with other former service members (from left) Anthony Woods, David Hall and Todd Belok. Harry Hamburg/AP hide caption

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Defense Secretary Leon Panetta speaks to reporters after touring the National September 11 Memorial & Museum in New York City last week. Susan Walsh/AP hide caption

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In the decade since the attacks of Sept. 11, the number of drone strikes into Pakistan has grown dramatically. In January 2010, a U.S. Predator drone flies above the Kandahar Air Field in southern Afghanistan. Kirsty Wigglesworth/AP hide caption

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Deputy Defense Secretary William Lynn (left) presents Gen. David Petraeus with an American flag at his retirement ceremony after 37 years in the Army, in Arlington, Va., on Wednesday. Petraeus will now lead the CIA. Saul Loeb/AFP/Getty Images hide caption

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Adm. Eric Olson, former commander of the U.S. Special Operations Command, testifies before the House Armed Services Committee in 2009. Tim Sloan/AFP/Getty Images hide caption

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Asked about the looming budget cuts at the Defense Department, Adm. Mike Mullen, outgoing chairman of the Joint Chiefs of Staff, said in Baghdad on Tuesday that everything was on the table. Maya Alleruzzo/AP hide caption

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