The international reaction to Monday night’s devastating attack on an aid convoy in the Syrian town of Urem al-Kubra has been swift and furious. U.N. Secretary-General Ban Ki-moon, in an unusually forthright speech at the General Assembly, described the attack as “savage and apparently deliberate.” He concluded by saying the fate of Syria could not depend on the “future of one man,” namely Bashar al-Assad. According to a statement released Wednesday by the Free Syrian Army, 31 people in total died—19 civilians and 12 aid workers. The director of the local branch of the Syrian Arab Red Crescent (SARC), Omar...