Air Force Airman 1st Class Rachel Riley, an electrical power production apprentice training with the 366th Training Squadron, checks to see if all her tools are accounted for at Sheppard Air Force Base, Texas, Feb. 8, 2018. The 366th trains on a retired runway which was previously used in World War II. They train on mobile aircraft arresting systems which assist the aircraft in landing on rough terrain when runways aren't available. Air Force photo by Airman 1st Class Pedro Tenorio