Airman 1st Class Leomar Perez, defender with the 890th Security Forces Squadron, fireman carries Airman 1st Class Jacob Boyett from the 890th Security Forces Squadron, along with two ammo cans during the Crow Creek Challenge Sept. 6, 2019, at F. E. Warren Air Force Base, Wyo. The obstacles seen throughout the day included heavy lifting, running, and calisthenic exercises. (U.S. Air Force photo by Senior Airman Nicole Reed)