 With five air refueling squadrons assigned, the 4050th (and later the 499th) became the largest operational wing in SAC.The following April, the wing added a squadron in the mid Atlantic, the 303d Air Refueling Squadron at Kindley Air Force Base, Bermuda.The 19th was transferred to the 4038th Strategic Wing the same day in preparation for conversion to KC-135s to support the 4038th's B-52s.