Syria

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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)

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In this photo from March 11, 2012, Syrian rebels rest during a day of 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)

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In this photo from March 11, 2012, Syrian rebels take position during clashes with 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)

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In this photo from March 11, 2012, a Syrian rebel reacts after learning the death of at least four comrades and several injured during clashes with Syrian government forces outside a hospital 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)

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In this photo from March 11, 2012 photo, a man carries a boy who was severely wounded during heavy fighting between Syrian rebels and 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)