U.S. Air Force crew chiefs assigned to the 728th Air Mobility Squadron walk down the flight line following a refueling operation as part of an Agile Combat Employment training event at Incirlik Air Base, Turkey, Nov. 4, 2021. Exercising elements of ACE enables Airmen in Europe to operate from locations with varying levels of capacity and support and deliver lethal combat power across the spectrum of military operations. U.S. Air Forces in Europe-Air Forces Africa is operationalizing concepts designed to make Airmen more agile and resilient. (U.S. Air Force photo by Staff Sgt. Alexander Cook)