YEOJU-GUN, SOUTH KOREA - OCTOBER 30: South Korean soldiers participate in a river crossing operation in preparation for a possible North Korean attack on October 30, 2009 in Yeoju, South Korea. The Korean peninsula is the world's last Cold War frontier as stalinist North Korea and pro-western South Korea have been technically at war since the 1950-53 conflict. Getty Images logo Getty Images 27 months ago

YEOJU-GUN, SOUTH KOREA - OCTOBER 30: South Korean soldiers participate in a river crossing operation in preparation for a possible North Korean attack on October 30, 2009 in Yeoju, South Korea. The Korean peninsula is the world's last Cold War frontier as stalinist North Korea and pro-western South Korea have been technically at war since the 1950-53 conflict.