U.S. Airmen from the 39th Security Forces Squadron perform an obstacle during an obstacle course in preparation for the 2018 Defender’s Challenge at Incirlik Air Base, Turkey, July 30, 2018. The obstacle course was used to challenge the 39th SFS Airmen in a different way in hopes it will prepare them for the competition. (U.S. Air Force photo by Staff Sgt. Kimberly Nagle)