Category Archives: 1950s

Nuclear test causes most significant accidental radiological contamination ever by U.S. 60 years ago this hour (Mar 1 1954)

Video: 'Castle Bravo Nuclear Test'

(Monday, March 1, 1954, 6:45 a.m. local time; Sunday, February 28, 1954, 1:45 p.m. EST) — The United States detonated a dry-fuel hydrogen bomb, codenamed Castle Bravo, at Bikini Atoll in the Marshall Islands today. The explosive yield of 15 megatons, much greater than expected, dropped radioactive fallout on occupied islands hundreds of miles away.

Mamie Eisenhower christens first atomic submarine 60 years ago today (Jan 21 1954)

Video: 'USS Nautilus & Submarine History: "Take 'Er Down" 1954 US Navy 14min' (Jan. 21, 1954, at 11:33)

(Thursday, January 21, 1954; during the Cold War) — The world’s first operational nuclear-powered submarine, the USS Nautilus, was launched today at Groton, Connecticut, as First Lady Mamie Eisenhower christened the vessel with the traditional bottle of champagne broken against the bow.