GRABLE EVENT - 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. Frenchman's Flat, Nevada - Atomic Cannon TestHistory's first atomic artillery shell fired from the Army's new 280-mm artillery gun. Hundreds of high ranking Armed Forces officers and members of Congress are present. The fireball ascending. (Photo: US Army)
Coming to terms with the nuclear risks of the Ukraine war

The US and Russia both have integrated doomsday weapons into conventional war plans. The risk is low but it isn’t zero.

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