Capt. Michael Herbert, a test manager in the Arnold Engineering Development Complex Aerodynamics Test Branch at Arnold Air Force Base, center, leads cadets with Air Force ROTC Detachment 290 from the University of Kentucky on a tour of AEDC Propulsion Wind Tunnel facilities at Arnold, March 19, 2021. The cadets visited Arnold last month to complete required Professional Development Training. (U.S. Air Force photo by Bradley Hicks)