I found this picture at the Beirut Memorial Online, and here you can find a list of the fallen from this terrible day. Go look, and think about the lives cut short, as represented by every name there.
Aerial view of the headquarters of Battalion Landing Team 1st Bn., 8th Marines, the ground combat element of the 24th Marine Amphibious Unit, in Beirut, Lebanon where 220 Marines, 18 Sailors, and three soldiers were killed when an explosive-laden truck slammed into the building on Oct. 23, 1983, completely destroying the structure.
Source: U.S. State Department.
[...]October 23, 1983 bombing of the United States Marine barracks in Beirut, Lebanon. The United States honors the sacrifices of the 241 American servicemen who lost their lives that day in service of their country while protecting the stability of Lebanon. The Marine barracks memorial on the grounds of the U.S. Embassy in Beirut reads, “They came in peace.”
(picture: courtesy of University of Maine)
MUCH MORE, with eyewitness video here.