Bomber pilots made the 18-hour flight from Missouri to Iran undetected, soaring miles above the Earth and refueling midair before executing the strikes.

The B-2 stealth bombers that dropped massive bunker-buster bombs on Iranian nuclear facilities began returning to their U.S. base in Missouri on Sunday.An Associated Press journalist watched on a clear but windy afternoon as seven of the B-2 Spirit bombers came in for landing at Whiteman Air Force Base.