81st SFS hosts Defender's Challenge Ruck
Ruck sacks are displayed on the ground during the 81st Security Forces Squadron Defender's Challenge Ruck near the Crotwell Track on Keesler Air Force Base, Mississippi, Aug. 16, 2019. The competition, consisting of 11 four-person teams, completing seven obstacles, was one of several events in recognition of The Year of the Defender. (U.S. Air Force photo by Kemberly Groue)