Bunker Buster Act of 2025

This bill lets the President, if Israel asks and strict conditions are met, help Israel prepare if Iran moves toward building a nuclear weapon. It allows building and basing in Israel for very large “bunker buster” bombs called the Massive Ordnance Penetrator, storing those bombs in Israel for U.S. use, and transferring them to Israel only if Iran violates nuclear safeguards or limits inspectors, it’s vital to U.S. security, Israel has no other way to stop underground sites, and the U.S. and Israel use a dual‑key system so both must approve any use. It also allows training and joint research to improve weapons that can destroy underground sites, including Hezbollah rocket facilities and underground Iranian nuclear sites. This bill does not give permission to start a war with Iran.

The bill says Iran has increased uranium enrichment, holds a large stockpile, and supports groups like Hamas, Hezbollah, and the Houthis. It says the U.S. should push to extend limits on Iran’s enrichment, make sure Israel and other allies are ready, and send a clear signal that an Iranian nuclear weapon will not be tolerated.

• Who is affected: U.S. defense agencies and Israel’s military.
• What changes: Possible construction in Israel to handle bunker‑buster bombs; storage of those bombs by the U.S.; transfer to Israel only under strict conditions and with dual‑key control; training and joint research on destroying underground sites.
• When it applies: Only after the President certifies it is vital to U.S. security and Iran has breached nuclear safeguards or limited inspectors, among other conditions.