U.S. Air Force Master Sgt. Carlos Caballero, 7th Component Maintenance Squadron central repair facility support chief, smiles as he runs the half marathon during the Dyess Mini Marathon, at Dyess Air Force Base, Texas, Sept. 17, 2016. More than 50 participants across Abilene competed in the 5K, 10K or half marathon to celebrate the Air Force's 69th birthday. (U.S. Air Force photo by Senior Airman Kedesha Pennant)