Capt. Michael Herbert, test manager in the Arnold Engineering Development Complex Aerodynamics Test Branch at Arnold Air Force Base, shows cadets with Air Force ROTC Detachment 290 from the University of Kentucky a model of the Propulsion Wind Tunnel at Arnold, March 19, 2021. The cadets, pictured from left, are Dominick Herbert, Andrew Kauffman, Dillyn Twisdale and Olivia Liddle. (U.S. Air Force photo by Bradley Hicks) (This image was altered by obscuring badges for security purposes.)