The NSA's problem? Too much data.
The National Security Agency's Special Source Operations branch manages "partnerships" in which U.S. and foreign telecommunications companies allow the NSA to use their facilities to intercept phone calls, e-mails and other data. This briefing describes problems with overcollection of data from e-mail address books and buddy lists, as well as NSA efforts to filter out what it does not need.
GRAPHIC: Barton Gellman and Matt DeLong - The Washington Post.