72-hour mission
A KC-135 Stratotanker refuels a B-52 Stratofortess, departing McGhee Tyson Air National Guard Base, Tenn., for a 72-hour endurance mission Oct. 6, 2022. For more than 72-hours, the KC-135 only landed to refuel, change crews, and service engine oil while keeping at least one engine running. (U.S. Air Force photo by Airman 1st Class Jenna A. Bond)