The 30,000-pound guided bomb is designed to penetrate an estimated 200 feet through rock or other hard substances before destroying enemy labs or bunkers.
The B-2's pilot fought hard to keep it from veering off the runway after its landing gear collapsed, even standing up to put all his weight on the brake.
Taking off from the U.S. heartland, B-2 stealth bombers, aided by refueling tankers and fighter jets, delivered a total of 420,000 pounds of explosives.