The main security concern at the Khobar Towers compound before the bombing had been the prevention of an attack similar to the 1983 Beirut barracks bombings, when a vehicle-bomb entered the compound itself. Yet the Pentagon's report from that incident suggested, as did the Khobar report, that a Beirut-sized bomb would still have caused significant damage from as far as 300 feet away. Officials concluded with the observation that bomb size was less important to the production of catastrophic results than that same bomb's effective proximity (blast radius).