PACIFIC OCEAN (July 21, 2021) Hospital Corpsman 1st Class Josh Moore, right, from Baltimore, goes through a sentry security qualifying course aboard the amphibious transport dock ship USS John P. Murtha (LPD 26) during a routine underway. John P. Murtha is underway conducting routine operations in U.S. 3rd Fleet. (U.S. Navy photo by Mass Communication Specialist 2nd Class Curtis D. Spencer)