The National Security Agency (NSA) is the main US agency for global monitoring, collection, decoding, translation and analysis of foreign intelligence data.
The agency buggs electronic systems, protects the U.S. government communications and information systems, collects and stores all phone records of all American citizens. Following revelations by NSA contractor Edward Snowden in 2013 there have been calls to curb the NSA's powers.
Germany's top diplomat has said that Berlin wants to renew its friendship with the US on an "honest foundation." The olive branch comes after Germany asked the CIA station chief to leave the country over a spy scandal.