My first thought was some sort of nuclear assurance. In the UK we have radio 4 broadcasting constantly, if there&#x27;s no communication and radio 4 isn&#x27;t broadcasting then we assume a London may have been bombed and a nuclear alert is issued.<p><a href="http:&#x2F;&#x2F;www.manchestereveningnews.co.uk&#x2F;news&#x2F;greater-manchester-news&#x2F;radio-silence-puts-subs-on-nuclear-1157478" rel="nofollow">http:&#x2F;&#x2F;www.manchestereveningnews.co.uk&#x2F;news&#x2F;greater-manchest...</a>