France’s signals intelligence organization, based at Domme in the Dordogne, with intercept stations located at French military installations overseas. During the Cold War there were others at Bahrsdorf in the Harz mountains, at Appen in Hamburg, and at Landau. The French did not share their product with the U.S. National
Security Agency, with the exception of data collected at a station at Berlin’s Tegel airport, which was also shared with the German Bundesnachrichtendienst.