Beirut, Lebanon — October 23, 1983 In a devastating act of terror early this morning, a massive explosion tore through the United States Marine barracks near Beirut International Airport, killing more than two hundred American servicemen in what officials are calling the deadliest single attack on U.S. forces since the Second World War. Witnesses described a thunderous blast that shook buildings miles away, reducing the four-story structure housing the Marines to a mound of shattered concrete an