This set of NSA talking points, dated 10 April 2013, outlines a plan for continuing the GCE intelligence-sharing arrangement beyond the Afghan war, which NSA and GCHQ would collaborate on closely: see the Intercept article The Powerful Global Spy Alliance You Never Knew Existed, 1 March 2018.

This 21 May 2009 presentation from the NSA’s Center for Content Extraction includes a slide that shows that the communications of 122 heads of government were stored in the agency’s central “Target Knowledge Base”, 11 of whom are named. The collection for most of these targets was automated: see the Der Spiegel article ‘A’ for […]

This internal NSA post from September 2006 describes the evolution of the European Security Operations Center and the focus of the US-German collaboration in signals intelligence: see the Der Spiegel article Terrorverdächtige: NSA nutzte Erkenntnisse aus Deutschland-Filiale für Tötungen, 15 June 2014.

This internal NSA report, dated 14 January 2005, describes the contribution of operations in Germany (“NSA/CSS Europe”) to counter-terrorism operations in North Africa: see the Der Spiegel article Terrorverdächtige: NSA nutzte Erkenntnisse aus Deutschland-Filiale für Tötungen, 15 June 2014.

Beginning in 2003, a team of NSA counterterrorism analysts based at NSA/CSS Europe began a dedicated project to support counterterrorism efforts in North Africa. The team collected signals intelligence, which they distributed to U.S. European Command and U.S. ambassadors, who then transmitted this information to governments in Mali, Algeria, and Mauritania. They believe this effort was "responsible for the capture or kill of over 40 terrorists."