The 280 mm Gun at the Nevada Proving Ground

The testing of the Mark 9 atomic artillery shell was the Grable event, part of a much larger series of nuclear detonations under the umbrella of Operation UPSHOT-KNOTHOLE in 1953. This operation conducted at the Nevada Test Site consisted of 11 atmospheric tests. There were three airdrops, seven tower tests, and one airburst. Conducted between March 17 and June 4, 1953, this operation involved the testing of new theories. A new and revolutionary method of producing deliverable nuclear ...


















