In this extract from a 22 November 2011 article in the NSA’s internal SIDToday newsletter the agency’s director of Signals Intelligence, Teresa Shea, talks about the NSA’s role in the raid on bin Laden’s Abbottabad compound in very general terms: see the Intercept article What the Snowden Files Say About the Osama Bin Laden Raid, 18 May 2015.
An Osama Bin Laden associate named Hassan Ghul, who was captured in 2004 and spent two years in a CIA prison, was killed in a drone strike after NSA signals intelligence pinpointed his location. The Washington Post reports that the documents provide an account of NSA-CIA collaboration in the drone campaign. A secret NSA unit called Counter-Terrorism Mission Aligned Cell, or CT MAC, spent a year tracking Ghul before he was killed.
This 32-page NSA presentation dated 25 February 2008 details XKeyscore, a tool used to search unfiltered internet traffic in real time. Two slightly different versions of this presentation have been published; both follow below: see the Guardian article XKeyscore: NSA tool collects ‘nearly everything a user does on the internet’, 31 July 2013.