190709-N-GN619-008 PORTSMOUTH, Va. (July 9, 2019) Lt. Cmdr. David Rhoiney, right, treats Master-at-Arms 2nd Class Benjamin Margriter, a simulated patient, during a mass causality exercise at Naval Medical Center Portsmouth (NMCP). (U.S. Navy photo by Mass Communication Specialist 2nd Class Kris R. Lindstrom/Released)