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