Airmen from the Special Tactics Training Squadron, 24th Special Operations Wing, Hurlburt Field, Fla., learn how to operate all-terrain vehicles during advanced tactical vehicle training at Eglin Range, Fla., Feb 1-4, 2015. The STTS trains special operations forces, including combat controllers and special tactics pararescueman, for rapid global employment to enable airpower success in austere and hostile environments. (U.S. Air Force photo by Senior Airman Christopher Callaway/Released)