A student paints the Facebook logo on a mural commemorating Egypt's revolution last spring. The team from the CIA's Open Source Center monitors social media activity overseas. Manoocher Deghati/AP hide caption

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Pentagon spokesman George Little, speaking Thursday, said U.S. and Pakistani forces both made mistakes that contributed to the Nov. 26 shooting that killed two dozen Pakistani soldiers along the border with Afghanistan. Luis M. Alvarez/AP hide caption

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Drone pilots fight a war from the safety of bases in the U.S. but confront some of the same wartime stresses as their comrades on the battlefield. Damian Dovarganes/AP hide caption

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Unmanned aerial vehicles, like this Predator (shown here in 2009 during training at Creech Air Force Base in Indian Springs, Nev.), make up the fastest growing segment of the U.S. Air Force. Ethan Miller/Getty Images hide caption

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Defense Secretary Leon Panetta testifies on Capitol Hill on Nov. 15. Debate over Pentagon spending cuts is heating up as a bipartisan congressional panel tries to come up with a plan to cut the federal deficit. Evan Vucci/AP hide caption

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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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