The Central Intelligence Agency (CIA) of the United States of America is required to declassify all records after a period of 25 years. These documents have been made available online in the CREST archive.
Over 12 million pages have been made available as full text in electronic format. It has only been possible to view these records online from January 2017, previously access was only available on site the National Archives in Maryland.
The CREST collection covers a myriad of topics, such as the early CIA history, the Cold War, Vietnam, the Berlin Tunnel project, the Korean War, and the U-2 reconnaissance aircraft. The documents also extensively address developments on terrorism, as well as worldwide military and economic issues.
The CREST Archive is freely accessible and can be used by anyone.
For a more detailed search you may want to use the U.S. Declassified Documents Online (USDDO) database by Gale. USDDO offers access to over 600,000 pages of primary source information from presidential libraries, the Department of State, Department of Defense, CIA, FBI, United Nations, and National Security Council, amongst others. The documents cover the period 1900-2008.
U.S. Declassified Documents Online’s greatest value lies in the wealth of facts and insights that it provides in connection with the political, economic, and social conditions of the domestic U.S. and foreign countries. Materials as diverse as State
Department political analyses, White House confidential file materials, National Security Council policy statements, CIA intelligence memoranda, and much more offer unique insights into the inner workings of the U.S. government and world events in the twentieth and twenty-first century.
A modern interface allows researchers in foreign policy, public policy, international law and security, modern history, area studies, journalism, and more to easily locate and analyse records from numerous agencies and libraries
USDDO is provided by subscription and requires a Raven login for off-campus access.