Ties between the U.S. and German have been tested since revelations last year that the N.S.A. had monitored the electronic data of millions of Germans, including the phone of Chancellor Angela Merkel. Now, Germany has expelled the CIA station chief suspected of espionage. In an interview with German television President Joachim Gauck said that if it turned out that the United States had been spying on Germany, “then that is really a gamble with friendship, with a close alliance.” Gregor Peter Schmitz, senior Washington correspondent for Der Spiegel joins us to discuss the state of U.S. German relations. (photo: A demonstrator with a mask depicting German Chancellor Angela Merkel poses in front of other protesters holding posters of former National Security Agency NSA member Edward Snowden outside the German parliament building prior to a special meeting of the parliament on US German relationships, in Berlin, Monday, Nov. 18, 2013. Posters read ‘Shelter for Edward Snowden in Germany’, and ‘Asylum’. (AP Photo/Markus Schreiber))