U.S. Air Force trainees with the 914th Air Refueling Wing Development and Training Flight, practice the High-Aerobic Multi-shuttle Run (HAMR) test in the fitness center at Niagara Falls Air Reserve Station, N.Y. on March 6, 2022. Trainees in the DTF have enlisted in the Air Force Reserve and participate in Unit Training Assemblies until they go to Basic Military Training. (U.S. Air Force photo by Staff Sgt. Tiffany A. Emery)