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An R-11 Refueler is on stand-by to refuel a U.S. Marine Corps F/A-18 Hornet on Andersen Air Force Base, Guam, Aug. 16, 2022. The R-11 Refueler’s fuel tank holds a maximum capacity of 6,000 gallons of fuel that can be issued to an aircraft at a rate of 600 gallons per minute.