Syria

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Syrian rebels are pictured at the Jarrah airfield in Syria's northern Aleppo province on Tuesday, Feb. 12, 2013, in this image taken from video and authenticated based on its contents and other AP reporting. (AP Photo/Ugarit News via AP video)

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In this photo released by the Syrian official news agency, SANA, Syrian President Bashar Assad, right, meets with Iran's Chief nuclear negotiator Saeed Jalili, in Damascus, Syria, Sunday, Feb. 3, 2013. (AP Photo/SANA)

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In this image taken from video obtained from the Ugarit News, which has been authenticated based on its contents and other AP reporting, a Free Syrian Army fighter speaks in front of a government intelligence complex in Deir el-Zour, Syria, on Tuesday, Jan. 29, 2012. (AP Photo/Ugarit News via AP video)

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Syrian refugees extinguish fire after it caught on a tent at Zaatari Syrian refugees camp, in Mafraq, near the Syrian border, Jordan, Monday, Jan. 28, 2013. A refugee tent caught on fire, and the family who lives in it was evacuated by the refugees. (AP Photo/Mohammad Hannon)

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Free Syrian Army fighters hold their weapons during heavy clashes with government forces in Aleppo, Syria, on Sunday, Jan. 20, 2013. (AP Photo/Andoni Lubaki)

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In this photo taken Jan. 10, 2013, from video obtained from the Shaam News Network, which has been authenticated based on its contents and other AP reporting, rebel fighters commandeer a captured Syrian Army tank in Taftanaz, in the Idlib province of northern Syria. (Associated Press/Shaam News Network via AP video)

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A Free Syrian Army fighter steps on a paper with the photo of Syrian President Bashar Assad in Aleppo, Syria, Tuesday, Jan. 15, 2013. (AP Photo/Andoni Lubaki)