Omitted relevant material, from here .

"The Attack: The United States Marines were stationed in Beirut as a peace keeping force. They were headquartered in a compound building at the Beirut International Airport. At 6:20 a.m. on October 23, 1983 most Marines were still in bed. A yellow Mercedes delivery truck, not unlike many other trucks that came and went around the Marine barracks entered the International airport, turned on an access road that led to the Marine barracks and circled around a parking lot. The truck turned towards the compound and raced forward. It crashed through a chain link fence separating the parking lot from the entrance to the barracks. It burst through a gate and drove into the lobby of Marine Headquarters. The truck, carrying more than 12,000 pounds of TNT, was detonated by the driver.

The four story building immediately collapsed. Two hundred and twenty Marines, eighteen Navy personnel and three Army soldiers lost their lives in the attack. Sixty Americans were injured in the explosion. Two miles away and twenty seconds later, at the French barracks, another truck exploded, killing fifty-eight French paratroopers and injuring 15. Rescue attempts at the barracks were difficult as snipers took shots at the rescue workers."