Demonstrators chant slogans and wave Syrian opposition flags during a protest against Syria's President Bashar al-Assad, Bustan al-Qasr district, Aleppo, Syria, March 1, 2013.

A man sells gas stoves in Aleppo, Syria, Feb. 28, 2013. 

A child looks out of a window in Aleppo, Syria, Feb. 28, 2013.

Men ride a scooter past buildings damaged by shelling from Syrian forces, Maarat al-Nuaman, Idlib province, Syria, Feb. 26, 2013.

A citizen journalism image provided by the Aleppo Media Center, AMC, shows people searching the rubble after houses were hit by a missile fired by Syrian government forces in Ard Al-Hamra, Aleppo, Syria, Feb. 26, 2013.

A boy walks past members of an Islamist group as they hold flags during a protest against Syrian President Bashar al-Assad's regime in Deir el-Zor, Syria, Feb. 25, 2013.

Destruction and debris are seen in Al-Suwayqa, Aleppo after forces loyal to Syrian President Bashar al-Assad captured the area from the Free Syrian Army, Feb. 25, 2013.

Ammunition that forces loyal to Syrian President Bashar al-Assad say belonged to the Free Syrian Army is seen in Al-Suwayqa, Aleppo, Syria, Feb. 25, 2013.

Free Syrian Army fighters carry their weapons and deploy after they seized control of the government's 80th Brigade's base near Aleppo International Airport, Feb. 23, 2013. 

A view shows military vehicles which belonged to forces loyal to Syrian President Bashar al-Assad forces at 80th Brigade's base after it was seized, Feb. 23, 2013.