refueled planes and ferried personnel and equipment to the region, while its B-52s bombed the Iraqi Republican Guard and targeted Iraqi infrastructure throughout January and February 1991. The Air Force underwent major restructuring after the Cold War ended. On 1 September 1991, the 93d lost its air refueling commitment, (924th ARS), and its KC-135 aircrew training missions (329th CCTS). It also implemented the objective wing organization and was redesignated as the 93d Wing. On 1 June 1992 the 93d was relieved from assignment to SAC and was reassigned to the newly formed Air Combat Command (ACC). It was then redesignated as the 93d Bomb Wing. Shortly afterwards it was announced that Castle AFB would close, under the Base Realignment and Closure Commission (BRAC) process. The 322d Bomb Squadron was inactivated 3 May 1994, and the wing became non-operational. The wing however continued to supervise the closure of Castle AFB, and was inactivated on 30 September 1995 with the closure of the base. Strategic Air Command: B-52 crew training When the first B-52s began to be assigned to SAC in 1955, Air Training Command had no school for the aircraft. Because of the need to get the bomber operational as soon as possible, SAC established the 4017th Combat Crew Training Squadron to conduct training on the Stratofortress. As the B-52 force expanded, the mission became too great for a single squadron and the wing's three bombardment squadrons took over the flight training program, while the 4017th conducted ground training and overall administration of the training program. As SAC's involvement in the Vietnam War increased, on 15 April 1968, SAC established a replacement training unit within the 4017th. This unit was established to qualify aircrews flying B-52E, B-52F, B-52G and B-52H bombers to fly the B-52D, which (with its Big Belly modification) was SAC's conventional bomber in Southeast Asia. After two weeks of training, the crews augmented the cadre unit in the Pacific. This training enabled SAC to meet its commitments, while at the same time spreading the burden of deployment more equitably among its entire force of B-52 crews. Joint STARS from 1996 While The 93d Wing had been inactivated in September 1995, the wing's history was too valuable, and Air Force leadership decided that it would rise in another guise. Just four months later it was redesignated as the 93d Air Control Wing (93 ACW), and was reactivated at Robins