BLU-82 aka " Daisy Cutter " . A 15,000 pound high explosive bomb so big it had to be dropped from a cargo plane such as a C-130 Hercules because the bomb bay doors of a B-52 bomber were too small. It was used during the Vietnam War to make instant helicopter landing zones because its blast area was so large and it would clear the jungle below. It detonated above ground about 100 feet above since they didn't want a huge crater but they wanted the jungle cleared. It is the Granddaddy of the GBU43/AB MOAB, officially called Massive Ordinance Air Blast or Mother Of All Bombs by the troops, weapon of 24,000 pounds used in Afghanistan to clear caves and to penetrate deep underground bunkers in Iraq.