160926-N-SU278-033 WATERS EAST OF THE KOREAN PENINSULA (Sept. 26, 2016) A Republic of Korea navy (ROKN) submarine maneuvers during a combined maritime operation in the waters East of the Korean Peninsula. The U.S. Navy Arleigh Burke-class guided-missile destroyer USS Spruance (DDG 111), not pictured, joined ROKN Aegis destroyers, submarines, anti-submarine helicopters, and U.S. and ROKN P-3 patrol aircraft in the operation that highlighted the unified naval force capabilities in defense of the Republic of Korea and region from surface, subsurface, and ballistic missile threats. (U.S. Navy photo by Mass Communication Specialist 2nd Class Will Gaskill/Released)