Lt. Tom Burgess, Tinker Fire and Emergency Services, right, shows Chief Master Sgt. Stan Cadell, command chief, Air Force Materiel Command, a “COVID Killer” spraying unit he designed to help sanitize fire trucks and living and office spaces with a low-cost liquid solution he developed. Cadell visited Tinker Air Force Base, Oklahoma, June 7-10, 2021, to visit with Airmen at the 72nd Air Base Wing as well as those supporting the Air Force Sustainment Center mission. (U.S. Air Force photo by Ron Mullan)