text: The partially-finished new headquarters building of Germany's Federal Intelligence Service, the Bundesnachrichtendienst (BND), is seen on July 12, 2014 in Berlin, Germany. In addition to a German employee of his country's foreign-intelligence agency, known as the Bundesnachrichtendienst (BND), who was arrested on suspicion of working as a double agent for the United States National Security Agency (NSA), a further blow to German-U.S. relations after suspicions that the latter agency had listened in on German Chancellor Angela Merkel's mobile phone, a second suspect, from the military, is also being investigated as a potential spy. As a result, the U.S. intelligence chief has been expelled from the country. Investigations into the exact extent of the American government's surveillance in the country are ongoing.