South Korean Marine Corps' amphibious vehicles take part in a mock landing operation in the sea off Incheon, west of Seoul, September 15, 2010.
REUTERS/Jo Yong-Hak
A South Korean soldier patrol as vehicles returning from North Korea's inter-Korean Kaesong Industrial Complex back to South Korea arrive at a checkpoint on the Grand Unification Bridge, which leads to the demilitarized zone separating North Korea from South Korea, in Paju, north of Seoul April 6, 2013. REUTERS/Lee Jae-Won
A member of the South Korean Special Warfare Forces reacts during a winter exercise in Pyeongchang, South Korea, January 4, 2011.
REUTERS/Lee Jin-man/ Pool