This citizen journalism image provided by Aleppo Media Center AMC which has been authenticated based on its contents and other AP reporting, shows smoke rising from heavy shelling in Aleppo, Syria, Tuesday Feb. 12, 2013. Rebels captured a military air bas

A man with a hand showing symptoms of leishmaniasis waits to be treated at a hospital in Aleppo, Syria, February 11, 2013.

Boys warm up next to a fire outside a building in the Ain Tarma neighborhood of Damascus, Syria, February 5, 2013.

Rubble and damaged buildings in Daraya after what activists said was shelling by forces loyal to Syria's President Bashar al-Assad, February 4, 2013. (Shaam News Network)

A member of the Free Syrian Army points his weapon through a hole in a wall as he takes up a defense position in Daraya February 4, 2013. (Shaam News Network)

A man carries his sister who was wounded in a government airstrike in Ansari, in Aleppo, Syria, February 3, 2013.

People carry a body after a government airstrike hit Ansari, Aleppo, Syria, February 3, 2013.

This citizen journalism image provided by Aleppo Media Center shows people searching through the debris of destroyed buildings after airstrikes hit Ansari, Aleppo, Syria, February 3, 2013.

A Syrian military tank is shown as having caught fire outside Deir Ezzor in this January 29, 2013, file photo.

Batería de misiles Patriot estadounidenses desplegada en Turquía en previsión de un ataque desde Siria.

A Free Syrian Army fighter prepares to fire a B-10 recoilless gun in the Haresta neighbourhood of Damascus February 7, 2013. REUTERS/Mohammed Abdullah (SYRIA - Tags: CIVIL UNREST POLITICS) - RTR3DGL9

Ugarit News image of smoke and fire billowing from an explosion in Damascus, Syria, Feb. 6, 2013

Rebeldes sirios combaten a tropas gubernamentales en un barrio de Damasco.

Smoke rises from a mosque and another building during heavy fighting between the Free Syrian Army and President Bashar al-Assad's forces, in the Jobar area of Damascus Feb. 6, 2013.

Syria, Mali Take Center Stage at Islamic Summit

In this Wednesday, Feb. 6, 2013 photo, Syrian people carry their belongings after they crossed the river which separates between Free Syrian Army fighters and government forces in the Bustan Al-Pasha neighborhood, north of Aleppo, Syria.(AP Photo/Abdullah

Mideast Israel Palestinians

Remains of cars Feb. 11, 2013 at border between Turkey and Syria in Hatay, Turkey (ANADOLU AGENCY / CEM GENCO)

Firefighters attempt to extinguish a fire at a factory after what activists say was shelling by forces loyal to Syria's President Bashar al-Assad at al-Haidariah area in Aleppo, February 8, 2013.

Free Syrian Army members raise an Islamic flag on a rooftop after heavy fighting with President Bashar al-Assad's forces, in the Jobar area of Damascus, Syria, Feb. 6, 2013.

A Syrian girl, who fled her home with her family in Idlib, collects water at a camp for displaced Syrians in the village of Atmeh, Syria, Thursday, Dec. 13, 2012. (AP Photo/Muhammed Muheisen)

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