Hard Rock
... that in 1982 the British civil defence exercise Hard Rock was cancelled when twenty local authorities refused to participate?
... that in 1982 the British civil defence exercise <b id="mwqw"><a href="./Hard_Rock_(exercise)" id="mwrA" rel="mw:WikiLink" title="Hard Rock (exercise)">Hard Rock</a></b> was cancelled when twenty local authorities refused to participate?