29 June 2013, WP: NSA slides explain the PRISM data-collection program 6 June 2013, WP: U.S., British intelligence mining data from nine U.S. Internet companies in broad secret program April 2013, Guardian, WP, ProPublica: NSA: SSO: PRISM/US-984XN Overview: The SIGAD Used Most in NSA Reporting (excerpts) (PDF)
http://apps.washingtonpost.com/g/page/national/inner-workings-of-a-top-secret-spy-program/282/
Inner workings of a top-secret spy program
By Barton Gellman and Todd Lindeman June 29, 2013 The National Security Agency's PRISM progam, which collects intelligence from Microsoft, Google, Yahoo, Apple and other tech giants, is "targeted" at foreigners. But it also collects the e-mail, voice, text and video chats of an unknown number of Americans -- "inadvertently," "incidentally" or deliberately if an American is conversing with a foreign target overseas. Here are new details on how the program works, from top-secret documents and interviews.
