The U.S. government’s mistakes in its occupation of Iraq coalesce in a deadly firefight on Sept. 16, 2007 in Nisour Square, in the heart of violence-ravaged Baghdad. The gun battle between Blackwater’s Tactical Support Team and armed insurgents echoes the struggle of U.S. Armed Forces to distinguish friend from foe in a country teetering on the brink of civil war. Innocent lives are tragically lost in the crossfire.