PACIFIC OCEAN (Sept. 3, 2021) Gunner's Mate 3rd Class Blake Greathouse, from Bellbrook, Ohio, remotely operates a Mk 38 25mm gun aboard the Arleigh Burke-class guided-missile destroyer USS Mustin (DDG 89), Sept. 3, 2021. Mustin is currently underway in the U.S. 4th Fleet area of responsibility conducting a series of exercises designed to increase interoperability and build capacity among partner nations. (U.S. Navy photo by Mass Communication Specialist 2nd Class James S. Hong)