Staff Sgt. Paul Rosales, 55th Security Forces Squadron combat arms instructor, heaves an ammo container during the 2018 Defender Challenge, Sept. 13, 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 ACC team won second place in the overall competition, combat endurance and weapons challenge. (U.S. Air Force photo by Airman Taryn Butler)