This internal NSA post from 1 February 2006 describes the visit several agency personnel to bases in Germany: see the Der Spiegel article Spying Together: Germany’s Deep Cooperation with the NSA, 18 June 2014.
This internal NSA post from 1 February 2006 describes the visit several agency personnel to bases in Germany: see the Der Spiegel article Spying Together: Germany’s Deep Cooperation with the NSA, 18 June 2014.