Upshot-Knothole Harry

Upshot-Knothole Harry (UK#9) was a nuclear weapons test conducted by the United States as part of Operation Upshot-Knothole. It took place at the recorded time of 04:05 (05:05 hrs ) hours, on the May the 19th, 1953 in Yucca Flat, in the Nevada Test Site. The sponsor of the test was the National Laboratory of the United States of America located at Los Alamos.