Free Syrian Army fighters hold their weapons during heavy clashes with government forces in Aleppo, Syria, on Sunday, Jan. 20, 2013. (AP Photo/Andoni Lubaki)

Photo by: Andoni Lubaki

Free Syrian Army fighters hold their weapons during heavy clashes with government forces in Aleppo, Syria, on Sunday, Jan. 20, 2013. (AP Photo/Andoni Lubaki)