The 151st Air Refueling Squadron is a unit of the United States Air Force, specializing in air refueling operations. Established as part of the Illinois Air National Guard, this squadron operates the KC-135R Stratotanker aircraft to extend the range and endurance of other U.S. military aircraft. The 151st ARS provides critical aerial refueling support for various missions, including tactical air operations, strategic transport, and rapid global mobility. The squadron is headquartered at Scott Air Force Base in Illinois.