Senior Airman Jeffrey Lewis, 822d Base Defense Squadron fireteam leader, participates in a four-mile ruck march during the Defender Challenge assessment, July 30, 2018, at Moody Air Force Base, Ga. Seven Moody defenders trudged through a gauntlet that tested their capability, lethality and readiness. Ultimately, only Lewis had the scores, determination and perseverance to advance to the next level for a chance to represent Air Combat Command during the 2018 Defender Challenge, Sept. 8-14, at Joint Base San Antonio-Camp Bullis, Texas. (U.S. Air Force photo by Airman 1st Class Erick Requadt)