Syria

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Members of a U.N. investigation team take samples from sand near a part of a missile that is likely to be a chemical-weapons rocket, according to activists, in the Damascus countryside of Ain Terma, Syria, on Wednesday, Aug. 28, 2013. (AP Photo/United Media Office of Arbeen) ** FILE **

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U.S. Secretary of State John Kerry departs Andrews Air Force Base, Md. for a meeting with Russian Foreign Minister Sergey Lavrov in Geneva to work on a Russian proposal for international inspectors to seize and destroy Syria's chemical weapons stockpile, Wednesday, Sept. 11, 2013. (AP Photo/Larry Downing, Pool)

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Joyce Brody (right) joins anti-war activists at a rally for peace outside the offices of Rep. Adam B. Schiff, California Democrat and a member of the intelligence committee, to urge him to vote against a military strike on Syria. (Associated Press)

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** FILE ** Syrian rebels rest during clashes with the nation's military troops in Aleppo, Syria, on Nov. 15, 2012. (Associated Press)

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A Syrian refugee sits on the ground at a temporary refugee camp in the eastern Lebanese Town of Al-Faour, Bekaa valley near the border with Syria, on Sept. 11, 2013. Lebanon is a tiny country that shares a porous border with Syria, and has seen cross-border shelling, sectarian clashes and car bombings in recent months related to the civil war raging next door. The country of 4.5 million already is already host to nearly 1 million Syrian refugees. (Associated Press)

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** FILE ** Free Syrian Army supporters in north Syria, Feb. 29, 2012. (Associated Press)

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President Obama, accompanied by Senate Sergeant at Arms and Doorkeeper Terrance Gainer, right, leaves a meeting with congressional Republicans on Capitol Hill in Washington, Tuesday, Sept. 10, 2013, where they discussed Syria. On Tuesday night, the president will address the nation on Syria. (AP Photo/Jacquelyn Martin)

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** FILE ** Defense Secretary Chuck Hagel testifies on Capitol Hill on Sept. 10, 2013, before the House Armed Services Committee hearing on the proposed authorization to use military force in Syria. (Associated Press)