160902-M-TM809-027 JAVA SEA (Sept. 2, 2016) Ensign Jessicah Coulston, a registered nurse from Rochester, New York and Hospital Corpsman 1st Class Katina Jack, from Meriden, Connecticut, perform a cricothyrotomy on a patient simulator during a Tactical Combat Casualty Care course aboard hospital ship USNS Mercy (T-AH 19). During the course, students learn life-saving techniques and strategies for providing trauma care on the battlefield. Deployed in support of Pacific Partnership 2016, Mercy is sailing to her homeport of San Diego. (U.S. Marine Corps photo by Sgt. Brittney Vella/Released)