U.S. Air Force Capt. Raychel Bates, center, 351st Air Refueling Squadron assistant “A” flight commander, discusses the process of building aircrews for the exercise on RAF Mildenhall, England, Feb. 26, 2018. Aircrews are comprised of two pilots and a boom operator, who conducts the refueling. (U.S. Air Force photo by Airman 1st Class Benjamin Cooper)

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Photo by: Airman 1st Class Benjamin Cooper |  VIRIN: 180226-F-IZ785-0066.JPG