War_Conflict

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British Foreign Secretary William Hague (right) greets US Secretary of State John Kerry ahead of a meeting in the Foreign and Commonwealth Office in central London, Wednesday April 10, 2013. Kerry is meeting in London with Syrian opposition leaders and Russia's top diplomat, a day after saying the U.S. could soon step up aid to rebels fighting Syrian President Bashar Assad's regime. Kerry is in London for a G8 foreign ministers' meeting today and Thursday. (AP Photo/Ben Stansall, pool)

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Fewer F-16s and other fighter jets are flying over Nellis Air Force Base near Las Vegas. These days, operators at the base conduct surveillance and hunt-and-kill missions in the safety of controls thousands of miles away. (United States Air Force) ** FILE **

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**FILE** In this citizen journalism image provided by Edlib News Network and authenticated based on its contents and other AP reporting, rebels from al Qaeda-affiliated Jabhat al-Nusra sit on a truck full of ammunition at Taftanaz air base, which was captured by the rebels, in the Idlib province of northern Syria. (Associated Press/Edlib News Network)

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**FILE** In this citizen journalism image provided by Edlib News Network, which has been authenticated based on its contents and other AP reporting, rebels from al Qaeda-affiliated Jabhat al-Nusra wave their brigade flag on the top of a Syrian air force helicopter on Jan. 11, 2013, at the Taftanaz air base in the Idlib province of northern Syria that was captured by the rebels. (Associated Press/Edlib News Network)

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** FILE ** French soldiers prepare to load a helicopter into a cargo aircraft to ship it back home to France, at Kabul military airport in Kabul, Afghanistan, Tuesday, March 12, 2013. (AP Photo/Ahmad Jamshid)