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WATERS TO THE EAST OF THE KOREAN PENINSULA (Oct. 28, 2015) The Ronald Reagan Carrier Strike Group and Republic of Korea (ROK) Navy ships steam in formation during a photo exercise. Ronald Reagan is participating in bilateral training with ROK Navy to strengthen the U.S.-ROK alliance and improve regional security. Ronald Reagan and its embarked air wing, Carrier Air Wing (CVW) 5, provide a combat-ready force that protects and defends the collective maritime interests of the U.S. and its allies and partners in the Indo-Asia-Pacific region.