Unclassified and released on 4/19/2013 in response to a FOIA request by MuckRock and reported by Wired: request, Untangling the Web: A Guide to Internet Research has not been updated since 2007. It is 651 page document that on one hand references sites and sources that no longer exist, but on the other offers insights in techniques and leverage the deep web and techniques to obtain effective competitive intelligence information and data.