High Quality Content by WIKIPEDIA articles! During the tremendous U.S. Air Force Strategic Air Command (SAC) expansion of the early and mid-fifties, bases become overcrowded, with some of them supporting as many as 90 B-47s and 40 KC-97s. The first B-52 wings were also extremely large - composed of 45 bombers and 15 or 20 KC-135s, all situated on one base. As the Soviet missile threat became more pronounced and warning time became less, SAC bases presented increasingly attractive targets. It was necessary to break up these large concentrations of aircraft and scatter them throughout more bases. Several KC-97 squadrons were separated from their parent B-47 wings and relocated to northern bases. The B-47 dispersal program was a long range one and would be affected primarily through the phase out of wings in the late fifties and early sixties.