Nine U.S. Air Force security forces Airmen fire the M9 pistol during Air Combat Command’s Defender Challenge team selection at Joint Base Langley-Eustis, Virginia, Aug. 21, 2018. At the end of the selection, six Airmen were chosen to represent ACC at the 2018 Air Force Defender Challenge. (U.S. Air Force photo by Staff Sgt. Areca T. Bell)