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An Airman from the 1st Civil Engineer Group’s 577th Expeditionary Prime Base Engineer Emergency Force Squadron does construction work on an F-16 maintenance hangar at Bagram Airfield, Afghanistan, May 4, 2018. Separate from traditional civil engineer units, the members of the 1st ECEG perform construction and repair in high-risk environments all across the area of operations. (U.S. Air Force photo by Staff Sgt. Joshua Horton)