U.S. Marine Corps Lance Cpl. Jarren Burleson, Armed Forces Network radio host, participates in the Alpha Warrior Fitness Challenge July 28, 2018, at Kadena Air Base, Japan. The challenge included sets of swinging metal rings and devil steps, which competitors had to utilize their core and upper body strength to maneuver in order to advance to the next obstacle. (U.S. Air Force photo by Senior Airman Kristan Campbell)