Syria

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Senate Intelligence Committee Vice Chairman Sen. Saxby Chambliss, Georgia Republican, arrives on Capitol Hill for a closed-door briefing with national security officials on the situation in Syria on Sept. 5, 2013. President Obama has requested congressional authorization of military intervention in Syria in response to last month's alleged sarin gas attack in the Syrian civil war. (Associated Press)

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Code Pink protesters bring their anti-war message to the Capitol before Wednesday's House hearing on President Obama's request for military intervention in Syria. (Associated Press)

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"The international community's credibility is on the line" with Syria, President Obama says during a news conference in Stockholm on Wednesday, a day before traveling to Russia for a Group of 20 summit. (Associated Press)

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Senate Foreign Relations Committee member Sen. John McCain, R-Ariz., reacts after the committee voted to accept his amendment as they consider the authorization for use of military force in Syria during a business meeting, Wednesday, Sept. 4, 2013, on Capitol Hill in Washington. (AP Photo/Susan Walsh)

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Free Syrian army fighters hold their weapons as they stand on a military tank in Idlib province, Syria, Wednesday, Sept. 4, 2013. (AP Photo/Aleppo Media Center, AMC)

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Defense Secretary Chuck Hagel, left, and Joint Chiefs Chairman Gen. Martin Dempsey, right, arrive for a closed-door intelligence briefing for members of the Senate Armed Services Committee, Wednesday, Sept. 4, 2013, on Capitol Hill in Washington, as Barack Obama seeks congressional authorization for military intervention in Syria. (AP Photo/J. Scott Applewhite)

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Sen. Rand Paul, Kentucky Republican, listens as Secretary of State John F. Kerry answers Mr. Paul's question on Capitol Hill in Washington on Tuesday, Sept. 3, 2013, as Mr. Kerry testifies at a Senate Foreign Relations Committee hearing on Syria. (AP Photo/Jacquelyn Martin)

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Sen. John McCain, Arizona Republican, asks a question during a Senate Foreign Relations Committee hearing on Syria on Capitol Hill in Washington on Tuesday, Sept. 3, 2013. (AP Photo/Jacquelyn Martin)