Project SHAMROCK

Project SHAMROCK was a United States government domestic espionage project operated by the predecessor to the National Security Agency (NSA) between the 1940s and 1970s. Project SHAMROCK was the sister project to Project MINARET, an espionage exercise started in August 1945. Project MINARET involved the accumulation of all telegraphic data that entered or exited the United States. The Armed Forces Security Agency (AFSA) and its successor, the NSA, were given direct access to daily microfilm copies of all incoming, outgoing, and transiting telegrams via the Western Union and its associates RCA and ITT. NSA did the operational interception, and, if there was information that would be of interest to other intelligence agencies, the material was passed to them. Intercepted messages were disseminated to the FBI, CIA, Secret Service, Bureau of Narcotics and Dangerous Drugs (BNDD), and the Department of Defense. No court authorized the operation and there were no warrants.

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