In this Tuesday, Oct. 30, 2012 photo, a rebel fighter belonging to the Liwa Al-Fatah takes cover as he aims at an enemy position from a school building during skirmishes with the Syrian army in the nearby Bustan Al-Pasha front line in Aleppo, Syria. (AP Photo/Narciso Contreras)

Photo by: Narciso Contreras

In this Tuesday, Oct. 30, 2012 photo, a rebel fighter belonging to the Liwa Al-Fatah takes cover as he aims at an enemy position from a school building during skirmishes with the Syrian army in the nearby Bustan Al-Pasha front line in Aleppo, Syria. (AP Photo/Narciso Contreras)