GBU-57 Archives

GBU-57

Defense Threat Reduction Agency test personnel prepare to carefully offload the 30,000-pound massive ordnance penetrator, or MOP, for a static test at White Sands Missile Range, N.M. (DTRA photo)

Battle damage assessment from Iran strikes could lead to improvements in MOP bomb technology

A senior defense official discussed the Massive Ordnance Penetrator weapon during a briefing with reporters Thursday.

3 days ago By Jon Harper

A B-2 Spirit returns to Whiteman Air Force Base, Missouri, from a deployment to Diego Garcia, British Indian Ocean Territory, May 9, 2025. (U.S. Air Force photo by Senior Airman Devan Halstead)

Air Force drops 14 MOP bombs on Iranian nuclear sites during first operational use of the weapon

B-2 Spirit stealth bombers dropped a total of 14 GBU-57 “massive ordnance penetrator” weapons during Operation Midnight Hammer, according to senior officials.

Jun 22, 2025 By Jon Harper