Bunker Buster Act of 2025

HR 4281, the Bunker Buster Act of 2025, authorizes the U.S. President to provide military support to Israel to prepare for potential strikes against Iran’s underground nuclear facilities. It enables construction of infrastructure in Israel for heavy ordnance (like the Massive Ordnance Penetrator), storage of such munitions, training for Israeli personnel, and joint research to enhance capabilities for destroying underground targets. The bill requires specific certifications to transfer munitions to Israel, including evidence of Iran’s noncompliance with nuclear safeguards and a dual-control system requiring U.S. presidential approval. It explicitly states the bill does not authorize military action against Iran. The legislation focuses on readiness, not actual strikes, and directly affects U.S.-Israel military coordination.