Miller Vaccination Acting Defense Secretary Chris Miller receives the COVID-19 vaccine from Navy Seaman Samantha Alvarez at Walter Reed National Military Medical Center, Bethesda, Md., Dec. 14, 2020. SHARE IMAGE: Download Image: Full Size (5.76 MB) Tags: Miller, Navy, Acting Defense Secretary, Coronavirus, OWS, Warp Speed, covid19vaccine Photo By: Lisa Ferdinando, DOD VIRIN: 201214-D-BN624-0202.JPG Photo Gallery