In 1953, the United States conducted a historic nuclear test known as “Upshot-Knothole Grable” at the Nevada Test Site. It marked the first and only time the U.S. fired a live nuclear artillery shell, demonstrating the potential of atomic battlefield weapons. The 15-kiloton shell was launched from a specially designed M65 “Atomic Cannon” and detonated roughly seven miles away, producing a massive mushroom cloud. While showcasing Cold War military power, the test also raised concerns about the pr

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

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