GBU-57 Bunker buster bomb

The GBU-57 series the Massive Ordnance Penetrator (MOP) is a 30,000-pound, 20.5-foot-long-class precision-guided "bunker buster" bomb developed by Boeing for the United States Air Force. Due to its size and weight, the Northrop B-2 Spirit strategic bomber is currently the only U.S. aircraft in-service that can carry the bomb. The GBU-57 weapon was reportedly first used in combat on June 22, 2025, during the American strikes on Iranian nuclear sites at the Fordow Fuel Enrichment Plant, Natanz Nuclear Facility, and Isfahan.