XKeyscore presentation from 2008 – read in full
Training materials for the XKeyscore program detail how analysts can use it and other systems to mine enormous agency databases and develop intelligence from the web
• Revealed: NSA program that collects 'nearly everything a user does on the internet'
https:// www.theguardian.com/world/interactive/2013/jul/31/nsa-xkeyscore-program-full-presentation