Joseph Carroll (DIA)
When the U.S. Air Force was established as a separate executive department under the National Security Act of 1947, Secretary of the Air Force W. Stuart Symington, requested FBI Director J. Edgar Hoover to loan General Carroll to the services to organize a U.S. Air Force agency for investigative and counterintelligence functions. He organized and directed this new organization, the AFOSI, along the lines of the FBI rather than the U.S. Army's Criminal Investigation Command (USACIDC or CID). General Carroll was tendered a commission as a colonel, U.S. Air Force Reserve, January 12, 1948. He was ordered to active duty in the grade of brigadier general May 6, 1948, and promoted to major general August 11, 1950.
Air Force Systems Command
However, the Army Air Forces needed to achieve independence, which it did on 18 September 1947, with its transition into an independent United States Air Force. Also, the role of the Air Force in the postwar world had to be defined. The 1948 Finletter Commission published its report, "Survival in the Air Age", in January 1948. It set forth a new concept of airpower, i.e., a powerful peacetime force able to counter any enemy air attack. The Finletter Report inspired a group of senior USAF officers with backgrounds in engineering and related fields to analyze the existing R&D organization. Their findings, and the salesmanship of Generals Jimmy Doolittle and Donald Putt, convinced Air Force Chief of Staff General Hoyt S. Vandenberg to put the R&D mission on a more equal footing with the operational Air Force. Accordingly, and in the face of intense Air Staff opposition, on 23 January 1950, the Research and Development Command (RDC) came into being. Eight months later it was re-designated the Air Research and Development Command (ARDC) as a separate organization devoted strictly to research and development.