Staff Sgt. David Gipson, 432nd Attack Squadron MQ-9 Reaper sensor operator, disassembles an M-4 carbine rifle at a skills station during the Warrior Challenge at Ellsworth Air Force Base, S.D., June 5, 2013. The course featured six obstacles including weapon disassembly and re-assembly, a self aid and buddy care scenario and improvised explosive device identification walk to test stamina, combat skills and teamwork capabilities. (U.S. Air Force photo by Airman 1st Class Alystria Maurer/Released)