A MH-60S Nighthawk helicopter deliveries supplies on the flight deck of amphibious transport dock ship USS Denver (LPD 9) during a vertical replenishment. Denver is assigned to Expeditionary Strike Group Seven and is participating in Exercise Ssang Yong, an annual combined exercise conducted by Navy and Marine forces with the Republic of Korea in order to strengthen interoperability across the range of military operations. (U.S. Navy photo by Mass Communication Specialist 3rd Class Bradley J. Gee/Released)