A U.S. official said that six American warplanes dropped a dozen 30,000-pound bunker-busters on the Fordo nuclear site, and that Navy submarines fired 30 cruise missiles at the Natanz and Isfahan sites. One B-2 bomber also dropped two bunker-busters on Natanz, the official said.

The United States has joined Israel in its attacks on Iran’s nuclear program. The U.N.'s atomic watchdog and other experts say radiological contamination is likely inside a key uranium enrichment site at Natanz that was badly damaged by Israel and then hit by U.