advocates, and chaplains. The 23 TRS also conducts a 13-training day Reserve Commissioned Officer Orientation (RCOO) program for hard-to-recruit medical officers in the Air Force Reserve and Air National Guard. The History of OTS When the Aviation Cadet (AvCad) Program proved insufficient to meet wartime commissioned officer requirements, the United States Army Air Forces established the Officer Candidate School (OCS) on 23 February 1942 at Miami Beach, Florida, its mission being to train and commission members from the enlisted ranks. OCS moved to the San Antonio Aviation Cadet Center (now Lackland AFB), Texas, in 1944 and gained the additional mission of training officers directly from civilian status in September 1951. OTS was organized at Lackland AFB, Texas, in November 1959, with the first OTS class (60-A) composed of 89 officer trainees, including 11 women, who graduated and were commissioned as 2nd Lieutenants on 9 February 1960. The number of OTS graduates has varied over the years, from 323 the first year to a high of 7,894 officers in 1967. With the establishment of OTS, Air Force OCS closed its doors and conducted its last graduation in June 1963. Concurrently, the Air Force also commenced a phaseout of its long-standing Aviation Cadet (AvCad) Program at Lackland AFB. Unlike OTS, AvCad was limited to pilot and navigator candidates. In addition, AvCads had to successfully complete either undergraduate pilot training or undergraduate navigator training before they could be commissioned as Second Lieutenants. The last AvCad pilot was commissioned in October 1961 at the former Reese AFB, Texas, and the last AvCad navigator was commissioned in March 1965, at the former James Connally AFB, Texas. OTS then became the sole organization for training future Air Force officers at Lackland AFB. On 1 July 1993, Air Training Command (ATC) merged with Air University (AU) to form the new Air Education and Training Command (AETC), with Air University becoming a direct reporting unit (DRU) under AETC. OTS, which was formerly under ATC, and Air Force ROTC, which was formerly under AU, were then realigned under both AETC and AU. Until 22 September 1993, Officer Training School was primarily located on the Medina Annex of Lackland AFB, Texas, with the last OTS class, Class 93-06, graduating from that location on that date. For a short period during the build up of the Air Force to meet the demands of the Vietnam War, as many as three OTS