The NSA has recently declassified its internet research how-to manual, Untangling the Web: An Introduction to Internet Research (PDF), and evidently someone grabbed it via a FOIA request.
It’s 600 pages, folks. It is going to be a slow download. It’s also based on 2007 technology, which is something like 1 1/2 internet generations ago. Still, it is an interesting look at how that never-talked-about agency, the NSA, works.
(h/t Frank Paynter)