They did it their own way

The US embassy is becoming a focus in the current scandal over eavesdropping by the National Security Agency (NSA) but also GCHQ on the mobile phone of German Chancellor Angela Merkel.
Look at this one Reuters' thermal imaging picture.
There is some secret listening post in the heart of Berlin.
Thermal imaging of the U.S. embassy in Berlin shows suspected covered windows believed to be used by a surveillance team targeting the communications of Merkel and other high-ranking European leaders.