Senior Airman Jeffrey Lewis, 822d Base Defense Squadron fireteam lead, rips open a packet during the 2018 Defender Challenge, Sept. 11, at Joint Base San Antonio-Camp Bullis, Texas. Teams representing all twelve Air Force major commands, the Royal Air Force Regiment and German Air Force participated in the friendly competition, which tested their capabilities in dismounted operations, combat endurance and weapons tactics. The Air Combat Command team won second place in the overall competition, combat endurance and weapons challenge. (U.S. Air Force photo by Airman Taryn Butler)