POHANG, SOUTH KOREA - NOVEMBER 04: U.S. amphibious assault vehicle partcipates in the U.S. and South Korean Marines Joint Landing Exercise at Pohang seashore on November 4, 2009 in Pohang, South Korea. South Korean marines conducted a joint landing operation with U.S. marines to prepare for possible aggression by North Korea, which the South remains technically at war with since the end of the Korean War in 1953.