COVID-19 Procedure Air Force Tech. Sgt. Steve Zavala demonstrates COVID-19 testing procedures at Royal Air Force Croughton, England, Aug. 3, 2020. Zavala discovered a COVID-19 testing technique that needed to be changed and elevated the concern, shaping testing procedures across the Defense Department. SHARE: Download: Full Size (1.37 MB) Tags: Air Force, Coronavirus Credit: Air Force Airman 1st Class Jennifer Zima VIRIN: 200803-F-IM475-1041C.JPG Photo Gallery