On May 25, 1953, at the Nevada Test Site, the US Army fired its M65 "Atomic Annie" 280-mm cannon in the Grable test of Operation Upshot-Knothole. The W9 nuclear shell traveled about 7 miles and detonated as an airburst with a yield of 15 kilotons—the only time a nuclear artillery projectile was ever fired from a cannon. #usarmy #nuke #bomb #missile #armybomb #unitedstates🇺🇸 #nevada #ad #tophistoric | Historic Moments

1953 #OnThisDay The first and (thankfully) only nuclear artillery test is carried out when a 800 lb. shell is fired 6 miles at the Nevada Test Site. | American Heroes Channel

On May 25, 1953, the United States military conducted the "Grable" test, successfully firing a 15-kiloton nuclear artillery shell known as "Atomic Annie." This historic event marked the only time a nuclear device was ever fired from an artillery cannon. | History In Pictures