ultimately producing 21,519 crew members. In 1954, with the requirements for B-29 crewmen reduced, the CTAF instituted instrument training for four-engine transport crews using the Fairchild C-119 Flying Boxcar, and added Martin B-57 Canberra crew training to Randolph's activities, although a shortage of qualified instructors cut short the latter program after two years. The USAF Helicopter School was based at Randolph from June 1956 to July 1958. The 3510th conducted Boeing KC-97 Stratofreighter crew training from June 1957 to July 1958, after which the Strategic Air Command assigned a tenant wing to Randolph, the 4397th Air Refueling Wing, to instruct crews until 15 June 1962. The Crew Training Air Force was discontinued on 1 July 1957, and the headquarters of the Flying Training Air Force relocated to Randolph. Shortly after, between 1 August and 30 September, the headquarters of ATC itself relocated to Randolph from Scott Air Force Base, Illinois. In early 1958 ATC assumed responsibility for all Air Force training activities and all other training commands including the Flying Training Air Force were abolished. The 3510th CCTW was redesignated the 3510th Flying Training Wing on 1 June 1958 with the primary mission of qualifying USAF jet pilots. The Lockheed T-33 Shooting Star was the workhorse trainer during the 1950s and 1960s at Randolph AFB. In 1961 pilot instructor training (PIT) returned to the 3510th Flying Training Wing. Randolph became the Air Force's primary PIT base as the Air Force completely revamped its pilot training program, abolishing the nine independent pilot training squadrons (contract instructors) that had been performing primary training for a decade and gearing up to conduct all undergraduate pilot training (UPT) in jet aircraft. Class 62-FZ produced 25 pilots who completed their training in the new Northrop T-38 Talon, then undergoing test and evaluation, only the second class of candidates to receive their wings at Randolph (Class 42-X was the first class to do so). Requirements for new pilots during the Vietnam War saw PIT shifted again, from Randolph to Perrin and Tyndall Air Force Bases, and on 16 May 1967, while retaining its "flying training" designation, Randolph resumed primary training in the Cessna T-37 to become the ninth UPT wing. 1,269 pilots earned their wings at Randolph before UPT was discontinued at Randolph on 2 October 1971. The PIT squadrons at Perrin and Tyndall both returned to Randolph in June 1971 and it became the only