The first of several U.S. Air Force B-2A “Spirit” long-range stealth bombers was spotted returning to Whiteman Air Force Base in Missouri within the past hour, following a nearly 40-hour strike mission.

As part of “Operation Midnight Hammer,” the bombers dropped a total of 14 GBU-57A/B Massive Ordnance Penetrators (30,000-pound “bunker buster” bombs) on two Iranian nuclear facilities.