was transferred to England AFB, Louisiana where it replaced the temporary 4403d TFW, and the 561, 562 and 563 TFS were assigned to the 35 TFW at George AFB, California. The administrative organization in command of these wings was the 835th Air Division, activated on 24 June 1964. This AD was inactivated 30 June 1971, leaving the 23d TFW as the main air unit at McConnell until its departure a year later. Strategic bomber/air refueling McConnell received a new mission in April 1971 with the arrival of the 91st Air Refueling Squadron (ARS) and their Boeing KC-135A Stratotankers from Robins AFB, Georgia. Control of the base was transferred back to SAC on 1 July 1972, and the 384th Air Refueling Wing (ARW) began its tour at McConnell AFB in December 1972 and took control of the 91st ARS. On 30 September 1973, a second KC-135A refueling squadron, the 384th ARS was activated on the base, making McConnell an air refueling hub for SAC. In early 1983, the 384 ARW's leadership learned that it would be the first wing to receive the upgraded KC-135R. The 91st and 384th ARW were both upgraded to the new model in 1984. The "R" model had upgraded engines which produced much greater fuel efficiency than the older models, as well as having a higher on-board fuel storage capacity. The initial aircraft marking for both squadrons was a light blue/navy blue diamond checkerboard fin flash. On 2 October 1981, President Ronald Reagan announced a Strategic Modernization Program (SMP), a key feature of which would be the procurement of 100 North American-Rockwell B-1B bombers. The first production models entered the USAF inventory in March 1985. It was announced by the Air Force that McConnell would be equipped with the B-1B in 1987. The 384th was redesignated as the 384th Bombardment Wing, Heavy on 1 July 1987, and the 28th Bombardment Squadron was activated that date to fly the 25 bombers assigned to the wing. With the arrival of the B-1s, the 91st ARS was inactivated, leaving the wing with one KC-135 tanker squadron. The 91st was later reactivated in July 1988 with the new 301st ARW at Malmstrom AFB, Montana with KC-135R aircraft. In January 1987, the Kansas Air National Guard 184th Tactical Fighter Training Group upgraded from its McDonnell-Douglas F-4D fighters to the General Dynamics F-16A/B Fighting Falcon and conducted conversion and upgrade training in the