Grable, the only nuclear artillery shell ever fired by the U.S. #atomic #nuclear #nuclear_bomb

The Grable test was part of Operation Upshot-Knothole in 1953, where the U.S. detonated a nuclear artillery shell. It had a yield of 15 kilotons and was fired from a 280 mm cannon. The test aimed to study the effects of nuclear explosions on military equipment and personnel.