Article: Remember When?: May 1957.(Features)

CHRISTMAS Island in the Central Pacific was the scene as Britain announced its arrival as a nuclear power.

It was on this day in 1957 that Britain exploded its first thermonuclear bomb.

The test was the culmination of a programme which started in December 1954 to develop the megaton hydrogen bomb, as powerful as a million tons of TNT.

The bomb was dropped by a four-engined jet, Valiant of No 49 ...

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