Lt. Col. Michael Schwan, 375th Operations Group deputy commander, and Maj. Matt Williams, 375th OG evaluations chief, Scott Air Force Base, Illinois, load their gear into an upgraded C-21A to perform a test flight Nov. 10, 2020, at Newton City Airport, Kansas. Testing modifications to the airframe gives the pilots a chance to familiarize themselves with the changes. (U.S. Air Force photo by Staff Sgt. Nathan Eckert)