High Quality Content by WIKIPEDIA articles! The GBU-43/B Massive Ordnance Air Blast bomb is a large-yield conventional bomb developed for the United States military by Albert L. Weimorts Jr. At the time of development, it was touted as the most powerful non-nuclear weapon ever designed.The bomb was designed to be delivered by a C-130. Since then, Russia has tested their "Father of All Bombs" which is claimed to be four times more powerful than the MOAB.