The M65 Atomic Cannon: A 280mm cannon that fired an Atomic warhead (known as "Grable") 7 miles, resulting in a detonation of 15 kilotons ("Little Boy" detonation at Hiroshima was 13kt). This
1953 Grable Nuclear Bomb Test PHOTO Atomic Cannon Shot,Operation Upshot-Knothole - St. Simons Island.com
This day in history Atomic Annie was fired : r/army
Atomic Annie | Never fired in war, only in test! The first a… | Flickr