81st SFS hosts Defender's Challenge Ruck
U.S. Air Force Staff Sgt. Thane Sandy, 81st Security Forces Squadron combat arms instructor, flips a tire during the 81st SFS Defender's Challenge Ruck on 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)