The 351st Air Refueling Squadron (351st ARS) is part of the 100th Air Refueling Wing at RAF Mildenhall, England. Since 1992, it has operated the Boeing KC-135R/T Stratotanker aircraft conducting primarily aerial refueling but also airlift and aeromedical evacuation missions. It previously flew the Boeing B-17 Flying Fortress during World War II and the Boeing B-47E Stratojet between 1956 and 1966 as the 351st Bombardment Squadron.