Air Force Expands COVID-19 Testing to Meet Demand Published Oct. 8, 2020 DOD News Preparing Samples Air Force Tech. Sgt. Jonisha Gibson prepares a sample for testing at Sheppard Air Force Base, Texas, April 9, 2020. Photo Details / Download Hi-Res Air Force Tech. Sgt. Jonisha Gibson prepares a sample for testing at Sheppard Air Force Base, Texas, April 9, 2020.