A Free Syrian Army fighter watches after setting tires and other objects on fire to provide cover from snipers loyal to Syria's President Bashar al-Assad, in Aleppo's Salaheddine district, Sept. 25, 2013.

Free Syrian Army fighters prepare to fire a homemade rocket in Ashrafieh, Aleppo, Sept. 25, 2013.

This image taken from video from the Sham News Network shows Syrian opposition fighters firing at government forces near Daraa, Sept. 25, 2013.

Smoke rises from buildings after an airstrike hit in Habit village, Hama, Syria, Sep. 25, 2013.

Free Syrian Army fighters visit the grave of their comrade who was killed in a recent attack, in a cemetery in Duma neighborhood in Damascus, Sept. 25, 2013.

Civilians walk as smoke rises behind a mosque after what activists say was shelling from the Syrian regime in Aleppo's Bustan al-Qasr district, Sept. 23, 2013.

Boys walk on the rubble of damaged buildings in Duma neighborhood of Damascus, Sept. 23, 2013.

Aisha Masri helps a wounded man at Karaj al-Hajez crossing, a passage way separating Aleppo's rebel-controlled and regime-controlled neighborhoods, Sept. 23, 2013.

A Syrian man with more than half his body burnt from an air strike leaves a field hospital to go back home at a village turned into a battlefield with government forces in Idlib province, Sept. 22, 2013.

Free Syrian Army members prepare food for their fellow fighters in a kitchen located near the frontline in the al-Khalidiya neighborhood of Aleppo, Sept. 22, 2013.