Massive US bunker-buster bombs make combat debut in Iran strikes

A powerful US bunker-busting bomb was used in combat for the first time when Washington struck Iranian nuclear sites this weekend.

Israel had carried out a week of air strikes on Iran, but does not possess the GBU-57 — a 30,000-pound (13,600 kilogram) weapon viewed as necessary to reach the most deeply buried facilities — or the aircraft needed to deploy it.

General Dan Caine, the top US military officer, told journalists on Sunday that Washington’s forces dropped 14 of the bombs in the…