Syria

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In this photo released by the Syrian official news agency SANA, Iranian aid supplies are seen unloaded from a plane at a Damascus airport in Syria on March 15, 2012. The Arabic words on the Iranian flags which attached on the boxes read: "Tribute of love and loyalty from the people of Iran to the dear Syrian people, left, and A gift from Islamic Iran to lofty Syria, right." (Associated Press/SANA)

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This image made from amateur video and released by Shaam News Network on March 15, 2012, purports to show an attack on a castle in Hama, Syria. (Associated Press/Shaam News Network via APTN)

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In this photo released by the Syrian official news agency SANA, Iranian aid supplies are seen unloaded from a plane at a Damascus airport in Syria on March 15, 2012. (Associated Press/SANA)

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In this photo released by the Syrian official news agency SANA, Syrian police officers demonstrate their skills March 15, 2012, during the graduation of instructor officers on fighting techniques under the supervision of North Korean experts at Bassel Assad police academy in Damascus, Syria. (Associated Press/SANA)

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Syrian rebels take position during clashes with government forces in Idlib, Syria, on Sunday, March 11, 2012. (AP Photo/Rodrigo Abd)

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In this photo from March 11, 2012, the wife of Mohammed Halak slumps in a chair next to his body as she mourns the death of her husband, who was killed during fighting between Free Syrian Army fighters and the Syrian Army in Idlib, north Syria. Scores of people have been reported dead during clashes between government forces and Free Syrian Army fighters. (Associated Press)

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In this photo from March 11, 2012, medics help a wounded man outside a hospital during fighting between Syrian rebels and government forces in Idlib, north Syria. Scores of people have been reported dead during clashes between Government forces and Free Syrian Army fighters. (Associated Press)

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In this photo from March 10, 2012, Aida, 32, reacts as she recovers from severe injuries after the Syrian Army shelled her house in Idlib north Syria. Aida's husband and two children were killed. (Associated Press)

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In this photo from March 11, 2012, Free Syrian Army fighters celebrate after hearing that their comrades destroyed a Syrian Army tank in Idlib, north Syria. (Associated Press)

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In this photo from March 11, 2012, Free Syrian Army fighters ride a motorbike to approach Syrian Army tanks in Idlib, north Syria. (Associated Press)

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In this photo from March 11, 2012, a Free Syrian Army fighter calls for reinforcements as they take cover on a corner in Idlib, north Syria. (Associated Press)

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In this photo from March 11, 2012, Free Syrian Army fighters are seen amid smoke from tank shelling during a day of fierce fighting with the government forces in Idlib, north Syria. At least four rebels were killed and several were injured when the tank shell landed. (Associated Press)

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In this photo from March 11, 2012, Free Syrian Army fighters cry after learning at least four comrades died during clashes with the government forces in Idlib, north Syria. (Associated Press)

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In this photo from March 11, 2012, a Free Syrian Army fighter is assisted by comrades seconds after being wounded by fragments of an exploding shell in Idlib, north Syria. (Associated Press)

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In this photo from March 11, 2012, Free Syrian Army fighters pause for a moment in between fierce firefights with Syrian Army in the town of Idlib, north Syria. (Associated Press)

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In this photo from March 11, 2012, a Syrian rebel reacts after learning at least four comrades died during clashes with Syrian government forces in Idlib, north Syria. (Associated Press)

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In this photo from March 11, 2012, Free Syrian Army fighters plant a roadside bomb to destroy a Syrian Army tank during a day of fierce fighting with the government forces in Idlib, north Syria. (Associated Press)

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In this photo from March 11, 2012, the wife of Mohammed Halak mourns after the man was killed by gunfire during fierce fighting between the Free Syrian Army and the government forces in Idlib, north Syria. (Associated Press)

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In this photo from March 10, 2012, Hana, 12, flashes the victory sign next to her sister Eva, 13, as they recover from severe injuries after the Syrian Army shelled their house in Idlib, north Syria. Their father and two siblings were killed. (Associated Press)

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In this photo from March 11, 2012, Syrian rebels carry the dead body of a comrade to a morgue after heavy fighting with Syrian government forces in Idlib, north Syria. Syrian activists said that pro-government gunmen have killed several people including children in a rebel stronghold recaptured by the government in the embattled central city of Homs. (Associated Press)