Part of Operation Upshot-Knothole, was a 15-kiloton test fired from a 280-mm cannon on May 25, 1953 at the Nevada Proving Grounds. 72 years ago the U.S. Army carried out its first and only nuclear ...
Imagine driving down highway 95 in southwestern Arizona. It’s sunset, not quite twilight yet, but you can see that night is quickly approaching. You’ve just passed a sign saying, “Yuma Proving Ground.
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