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 infantry and special forces
First formed during World War II, the United States Air Force Security Police were dramatically reduced in scope following the war. Post war the newly established United States Air Force (USAF) saw its primary role as a strategic one. Its base defense doctrine thus was one of security policing. United States involvement in Vietnam, however, brought a real and sustained threat of ground attack. To meet these threats the Phu Cat Air Base Security Forces pioneered the Air Base Ground Defense doctrine that informs USAF practice to this day.