Grapple_Y_test.jpg

Summary

Description Grapple Y test.jpg	English: The classic shape of the mushroom cloud rises above Christmas Island, flowing the Grapple-Y test on 28 April 1958. With a yield of 3 megatons, it was Britain's biggest nuclear explosion.
Date	28 April 1958
Source	https://web.archive.org/web/20070607113755/http://www.awe.co.uk/main_site/about_awe/history/timeline/1957/index.html
Author	Atomic Weapons Research Establishment

This work created by the United Kingdom Government is in the public domain .

This is because it is one of the following :

It is a photograph taken prior to 1 June 1957; or
It was published prior to 1974; or
It is an artistic work other than a photograph or engraving (e.g. a painting) which was created prior to 1974.

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