Declassified U.S. documents obtained through the Freedom of Information Act by the National Security Archive, an independent non-governmental research
institute and library at George Washington University. The Digital National Security Archive http://eresources.library.nd.edu/databases/natlsecurity provides enhanced access to a selected portion of the NSA collection.
A collection of more than 55,000 documents in a free, online format with extensive and searchable metadata linked to digitized images of each document,
thereby insuring free access for a wide range of users.