'Prolific Partner': German Intelligence Used NSA Spy Program

Germany's foreign intelligence service, the BND, and its domestic intelligence agency, the Federal Office for the Protection of the Constitution (BfV), used a spying program of the American National Security Agency (NSA). This is evident in secret documents from the US intelligence service that have been seen by SPIEGEL journalists. The documents show that the Office for the Protection of the Constitution was equipped with a program called XKeyScore intended to "expand their ability to support NSA as we jointly prosecute CT (counterterrorism) targets." The BND is tasked with instructing the domestic intelligence agency on how to use the program, the documents say.