A rebel sniper aims at a Syrian army position on the outskirts of Aleppo, Syria, Wednesday, Nov. 14, 2012. Heavy clashes between rebel units and Bashar Assad's troops were ongoing in the northern city of Aleppo, the Syrian Observatory for Human Rights said Wednesday. (AP Photo/Khalil Hamra)

Photo by: Khalil Hamra

A rebel sniper aims at a Syrian army position on the outskirts of Aleppo, Syria, Wednesday, Nov. 14, 2012. Heavy clashes between rebel units and Bashar Assad's troops were ongoing in the northern city of Aleppo, the Syrian Observatory for Human Rights said Wednesday. (AP Photo/Khalil Hamra)