Syria

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Members of the crowd hold up signs against military action in Syria as U.S. Sen. John McCain, R-Ariz., speaks with constituents during a town hall meeting at the Burton Barr Central Library, Thursday, Sept. 5, 2013, in Phoenix. The meeting, which was supposed to host a variety of topics that effect Arizonans, became a platform for the topic of military action in Syria. (AP Photo/Ralph Freso)

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Syria was expected to be among the topics during the bilateral meeting between President Obama and Japan's Prime Minister Shinzo Abe at the G-20 Summit on Thursday. (Associated Press)

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** FILE ** Sen. John McCain, R-Ariz., plays a hand held poker game during a Senate hearing on Syria, Tuesday, September 3, 2013. (Image: CNN screen shot)

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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)