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Post Info TOPIC: Operation Grapple X Round C1, 1957
Blobrana


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RE: Operation Grapple X Round C1, 1957
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Blobrana


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The first successful British H-bomb test - Operation Grapple X Round C1, which took place over Kiritimati.
Grapple X was dropped and detonated over the southern end of Christmas Island on 8 November 1957. The two-stage thermonuclear bomb exploded with a force of 1.8 megatons.
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