The picture was originally taken by the French Army and later scanned from a hardcopy and uploaded to Flickr by
Pierre J. In a codenamed '
Canopus' test, the French army detonated France's first two-stage thermonuclear bomb in the
Fangataufa atoll of Pacific Ocean on August 24, 1968. The nuclear explosion had a yield of 2.6 megatons.
