students. USAF students graduating from SUNT were assigned to B-52, C-130, AC-130, EC-130, HC-130, LC-130, MC-130, WC-130, KC-135, E-3, E-8, RC-135 and OC-135 aircraft. At the same time, a pre-selected cohort of USAF officer student navigators destined as weapon systems officers in the F-15E Strike Eagle, the B-1 Lancer, and, with the retirement of the EF-111 Raven, electronic warfare officers providing USAF manning of joint USN-USAF EA-6B Prowler squadrons, would complete a joint flight training program established between 19 AF and the Naval Air Training Command / Chief of Naval Air Training (CNATRA) with Training Air Wing SIX at Naval Air Station Pensacola, Florida. In this latter program, prospective USAF WSOs and EWOs would follow essentially the same training track as USN and USMC Student Naval Flight Officers destined for tactical fighter, strike and electronic attack aircraft, flying the T-34C Turbomentor in primary training until the T-34C's replacement by the T-6 Texan II, USAF T-1 Jayhawk aircraft on detached operations at NAS Pensacola, and USN/USMC T-39 Sabreliner aircraft in intermediate and advanced training under the tutelage of USN, USAF and USMC instructors. In 2009, with the transition of all USAF Navigators to Combat Systems Officers, the merger of SUNT into Undergraduate Combat Systems Officer Training (UCSOT), and pursuant to additional BRAC directives, the 12 FTW established the 479th Flying Training Group (479 FTG) with two flying training squadrons and an operations support squadron as a geographically-separated unit (GSU) at Naval Air Station Pensacola, Florida. Pursuant to USAF policy changes, AETC and CNATRA also discontinued joint training at Training Air Wing SIX with the establishment of the 479 FTG. Although NAS Pensacola remains the principal base for Student Naval Flight Officer (SNFO) training for the U.S. Navy and U.S. Marine Corps, the 479 FTG operates independently of this program with its own USAF T-6 Texan II and T-1 Jayhawk aircraft. Upon establishment of the 479 FTG at NAS Pensacola, the remaining "legacy" navigator training squadrons that had relocated from the former Mather AFB to Randolph AFB in 1992 were inactivated and the remaining T-43 Bobcat aircraft retired. Starting in the summer of 2010, following completion of Initial Flight Screening (IFS) at Pueblo Memorial Airport, Colorado with their USAF student pilot counterparts, all USAF CSO students undergo Undergraduate Combat Systems Officer Training (UCSOT) with the 479 FTG. Merging the three previous USAF Undergraduate Navigator Training (UNT) tracks formerly known as Navigator track,