LIMA, Peru (Oct. 1, 2021) Lt. Cmdr. Ryan Larson, attached to Naval Medical Research Unit 6 (NAMRU-6) briefs Rear Adm. Jim Aiken, commander, U.S. Naval Forces Southern Command/ U.S. 4th Fleet on the command's laboratory capabilities during an official command visit. NAMRU-6 conducts biomedical research in infectious disease in support of global health. (U.S. Navy photo by Cmdr. Kathryn Barnes)