Doctor Discussion Acting Defense Secretary Chris Miller talks with Navy Lt. Cmdr. Nate Aranas, a nurse in the Emergency Department at Walter Reed National Military Medical Center, after they received the COVID-19 vaccine at Walter Reed in Bethesda, Md., Dec. 14, 2020. SHARE: Download: Full Size (1.45 MB) Tags: Miller, Navy, Acting Defense Secretary, Coronavirus, warp speed, ows, covid19vaccine Credit: Lisa Ferdinando, DOD VIRIN: 201214-D-BN624-0260.JPG Photo Gallery