Capt. Daniel Castle, 349th Air Refueling Squadron pilot, runs along the two-mile track, Aug. 14, 2015, at McConnell Air Force Base, Kan. Castle has been an advide runner since college and is participating in the World Class Athlete Program that will allow him train for the 2016 Olympics. (U.S. Air Force photo by Airman 1st Class Christopher Thornbury)