All war is horrific, but some aspects of war are more horrific than others. The death toll of Syria's civil war was estimated last winter at 470,000, each a singular tragedy. Yet it's often particular weapons, used on particular targets, that cause international condemnation. When the State Department announced on Monday that the United States was suspending efforts to work with Russia on a ceasefire in Syria, the State Department listed in particular the targeting of civilians and aid convoys as the reason for the halt.