Florence County · Marker 21-26
Atomic Bomb Accident at Mars Bluff, March 11, 1958
E. Marion Hwy. (U.S. Hwy. 301/76) near the Francis Marion University Campus, Mars Bluff
Front inscription
In 1958, in the midst of the Cold War, the U.S. Air Force accidentally dropped an atomic bomb near here. The unarmed 7,600-lb., 10’8”-long bomb was aboard a B-47E bomber on a training mission headed for England. Its high-explosive trigger detonated on impact, making a crater as large as 35 feet deep and 70 feet wide.
Reverse inscription
The bomb landed in the woods behind the asbestos-shingle-sided home of railroad conductor Walter “Bill” Gregg (b. 1921). Gregg, his wife, their three children, and a niece were injured by the concussion, which destroyed the house and outbuildings and did slight damage to buildings within a 5 mile radius.