Human Rights Watch, another nongovernmental watchdog group, reported that Islamic State has used cluster munitions in at least one location: in the town of Ayn Al-Arab, 80 miles northeast of Aleppo city. The use of such ordnance leaves many unexploded bomblets on the battlefield, posing a serious risk to civilians long after hostilities have ceased. The munitions, which eject smaller explosive bomblets over an area, were banned in 2010 through the Convention on Cluster Munitions, though many countries -- including the U.S.