In 1953, the United States Department of Defense was conducting a series of nuclear weapons tests called Operation Upshot-Knothole. During this operation, eleven nuclear devices of varying yields were exploded at the Nevada Test Site, about sixty-five miles north of Las Vegas. Among those atomic explosions was a test called Shot Grable, where the U.S. Army tried out its new toy, nicknamed "Atomic Annie."
P.S. ...Кста, помимо 280-мм чудовища, рачительные янки озаботились и надкалиберным ядерным боеприпасом весом всего в 34,5 кг для 120-мм безоткатки M 28 Davy Crockett.