Syria

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Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff: "Once we take action [in Syria], we should be prepared for what comes next. Deeper involvement is hard to avoid. As we weigh our options, we should be able to conclude with some confidence that the use of force will move us toward the intended outcome."

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Republican Sens. John McCain (left) of Arizona and Lindsey Graham of South Carolina speak with reporters after a meeting at the White House with President Obama about the ongoing situation in Syria on Monday, Sept. 2, 2013 in Washington. (Associated Press)

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In this Sunday, Sept. 1, 2013, citizen journalism image provided by Edlib News Network, ENN, which has been authenticated based on its contents and other AP reporting, Syrian children hold signs during a demonstration in Maaret al-Numan, Idlib province, northern Syria. (AP Photo/Edlib News Network ENN)

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** FILE ** In this Aug. 30, 2013, file photo Secretary of State John Kerry makes a statement about Syria at the State Department in Washington. Kerry said in a series of interviews on news shows Sunday, Sept. 1, 2013, that the United States now has evidence of sarin gas use in Syria through samples of hair and blood provided to Washington by first responders in Damascus. (AP Photo/Charles Dharapak)

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"We should be choosing peace — not a new conflict," says former Rep. Ron Paul on his "Stay Out of Syria" petition. (Associated Press)

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** FILE ** President Obama delivers remarks about the ongoing situation in Syria in the Rose Garden of the White House on Saturday, Aug. 31, 2013, in Washington. Mr. Obama said that he has decided the United States should take military action against Syria in response to a deadly chemical weapons attack but that he will seek congressional authorization for the use of force. (AP Photo/Evan Vucci)

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Secretary of State John F. Kerry makes a statement about Syria at the State Department in Washington on Friday, Aug. 30, 2013. (AP Photo/Charles Dharapak)

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President Obama (left) and Vice President Joseph R. Biden arrive in the Rose Garden of the White House on Saturday, Aug. 31, 2013, in Washington to make a statement about the ongoing situation in Syria. Mr. Obama said that he has decided the United States should take military action against Syria in response to a deadly chemical weapons attack but that he will seek congressional authorization for the use of force. (AP Photo/Evan Vucci)