The U.S. crews involved in attacking the nuclear site at Fordo probably trained for years. But dropping 30,000-pound bombs was almost certainly a new experience.

According to Reuters, the attack involved B-2 strategic bombers previously redeployed to Guam, a US overseas territory in the Pacific

U.S. Air Force B-2 stealth bombers deployed in the attack against Iran nuclear facilities, confirmed by President Donald Trump on June 21.