U.S. Air Force Staff Sgt. Anthony Zygmunt, 7th Reconnaissance Squadron alarm monitor, performs physical exercises prior to firing during Air Combat Command’s Defender Challenge team selection at Joint Base Langley-Eustis, Virginia, Aug. 24, 2018. The team candidates performed a variety of physical exercises prior to firing the M4 carbine and M9 pistol during the selection. (U.S. Air Force photo by Staff Sgt. Areca T. Bell)