Description1957-06-03 British H-Bomb (claimed).ogv
English: The Grapple-Orange Herald atmospheric nuclear test of 31 May 1957 on Malden Island, reported by Universal International Newsreel as "British H-Bomb Fired As Debate On Atom Test Ban Rages" on 3 June 1957. It was claimed at the time to be the first British test of a H-bomb. It was later revealed to be a fusion boosted fission nuclear weapon test, where the fusion boosting failed to increase the yield. It still yielding 720 kT of explosive power, probably the largest A-bomb test ever.
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