The divided city of Berlin wasa hotbed of spying activity throughout the Cold War, with one famous operation involving atunnel being built by the British and US into Communist East Berlin to enablecommunications cables to be tapped.
Russia's KGB knew about the tunnel thanks to the treachery of George Blake, but did not take action against it in order to protect their mole in British intelligence.
In the 1950s, the US National Security Agency (NSA) used Berlin's highest hill, the Teufelsberg, as a listening station.
The site was frequently used by American soldiers and its five large satellite domes on top of the building, though unused, can still be seen today.
More top news
A Florida police officer has been suspended after footage showed him throwing peanuts at a homeless man 'like he was a circus animal'.
A German doctor has been charged with negligence after declaring an elderly woman dead, only for her to awaken at a funeral home.
Labour left-winger Jeremy Corbyn is on course to become party leader according to private polling which suggests he has a 22 point lead.