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U.S. Air Force Capt. Connor Brown (left), 384th Air Refueling Squadron KC-135 Stratotanker pilot and Capt. Eric Roach (right), 92nd Operations Support Squadron KC-135 pilot, fly during Fairchild’s Phase Two preparation exercise for Air Mobility Command’s capstone exercise, Mobility Guardian 2023, Feb. 14, 2023. The Phase 2 exercise emphasized aircrew endurance, dynamic air refueling concepts, testing of a variety of the KC-135 mission sets, and included an advanced 72-hour endurance event. (U.S. Air Force photo Staff Sgt. Lawrence Sena)