Monday, April 18, 1983 18 April 1983 One Marine Security Guard was killed and seven were wounded when a large car bomb exploded just outside the U.S. Embassy in Beirut, Lebanon. Lance Corporal Robert McMaugh was standing guard at Post 1, just inside the front entrance when the bomb exploded outside the door. The explosion killed 61 people including 17 Americans. LCpl McMaugh was buried at Arlington National Cemetery on 26 April. Print