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hernesheir commented on the word Grable test
The Grable test, part of Operation Upshot-Knothole, occurred on May 25, 1953 at Frenchman Flat in the Nevada Test site. A 15-kt atomic shell was successfully fired 7 miles by the M65 Atomic Cannon "Atomic Annie". This cannon is displayed at the US Army Military Museum at Fort Sill, Oklahoma.
December 14, 2013