Under the provisions of Executive Order 12958 (Classified National Security Information), dated 17 April 1995, NSA reviews for declassification all permanently classified documents 25 years or older. As these documents are declassified, they are turned over to the National Archives and Records Administration (NARA).
An index of 4,923 entries containing approximately 1.3 million pages of previously classified documents, which have been released to NARA is provided. The documents are from the pre-World War I period through the end of World War II.