BETHESDA, Md. (Jan. 13, 2021) Vice Adm. Michael L. Cowan (Ret), 34th Naval Surgeon General, receives the COVID-19 vaccine as part of Operation Warp Speed at Walter Reed National Military Medical Center. Operation Warp Speed is a national initiative to accelerate the development, production and distribution of COVID-19 vaccines, therapeutics and diagnostics. (U.S. Navy photo by Ricardo J. Reyes)