In this Friday, Aug. 24, 2012 photo, a Syrian prisoner holds the bars of a makeshift prison run by rebels in a former elementary school in Al-Bab on the outskirts of Aleppo, Syria. Many improvised detention centers have sprung up as rebels wrest cities from army control, but these facilities fall under no national or regional authority, causing concern among rights groups. (AP Photo/Muhammed Muheisen)