History
The National Security Agency's predecessor was the Armed Forces Security Agency (AFSA), created on May 20, 1949. This organization was originally established within the U.S. Department of Defense under the command of the Joint Chiefs of Staff. The AFSA was to direct the communications and electronic intelligence activities of the U.S. military intelligence units: the Army Security Agency, the Naval Security Group, and the Air Force Security Service. However, that agency had little power and lacked a centralized coordination mechanism. The creation of NSA resulted from a December 10, 1951, memo sent by Central Intelligence Agency (CIA) Director Walter Bedell Smith to James S. Lay, Executive Secretary of the National Security Council. The memo observed that "control over, and coordination of, the collection and processing of Communications Intelligence had proved ineffective" and recommended a survey of communications intelligence activities. The proposal was approved on December 13, 1951, and the study authorized on December 28, 1951. The report was completed by June 13, 1952. Generally known as the "Brownell Committee Report," after committee chairman Herbert Brownell, it surveyed the history of U.S. communications intelligence activities and suggested the need for a much greater degree of coordination and direction at the national level. As the change in the security agency's name indicated, the role of NSA was extended beyond the armed forces.
The creation of NSA was authorized in a letter written by President Harry S. Truman in June 1952. The agency was formally established through a revision of National Security Council Intelligence Directive (NSCID) 9 on October 24, 1952, and officially came into existence on November 4, 1952. President Truman's letter was itself classified and remained unknown to the public for more than a generation. A brief but vague reference to the NSA first appeared in the United States Government Organization Manual from 1957, which described it as "a separately organized agency within the Department of Defense under the direction, authority, and control of the Secretary of Defense for the performance of highly specialized technical functions in support of the intelligence activities of the United States."
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