The deadliest attack on a US diplomatic mission up to that time left many wondering what would come next. Just six months later, 241 US serivcemen would be dead after another truck bombing. And 18 months after the first embassy attack, in September 1984, a car bomb hit the new, more secure US Embassy in East Beirut, killing 2 Americans and 20 Lebanese.
It is believed the Iranian- and Syrian-backed terrorist group Hezbollah is responsible for the attack, claiming it under the name "Islamic Jihad," an alternate name for the group in the 1980's.