The card can be downloaded from the GCHQ website, and has become popular with teachers – the agency says a third of British secondary schools have downloaded it.
U.K. spy agency releasing annual Christmas card puzzle to uncover future codebreakers
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A GCHQ spokesperson said the agency was satisfied that justice had been served, calling it “a shocking, unprovoked attack, and its isolated nature does not make it any less upsetting.”
A former British cyberespionage agency employee gets life in prison for stabbing an American spy
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