The BLU-82 is a 15,000 pound GP bomb originally designed to clear helicopter landing zones in Vietnam. The warhead contains 12,600 pounds of GSX slurry and is detonated just above ground level by a 38-inch fuze extender. The weapon produces an overpressure of 1,000 pounds per square inch. Eleven BLU-82s were dropped during Desert Storm, all from Special Operations MC-130s. The initial drops were intended to test the ability of the bomb to clear mines; no reliable bomb damage assessment exist on mine clearing effectiveness. Later, bombs were dropped as much for their psychological effect as for their destructive power.