

A visitor walks past North Korea's Russian made Scud-B ballistic missile (grey) and South Korea's US made Hawk surface-to-air missiles at the Korean War Memorial Museum in Seoul February 15, 2013. North Korea recently conducted its third nuclear test in defiance of UN resolutions pushing it further along the path of developing a workable long-range nuclear missile. Kim Hong-Ji/Reuters
North Korean army officers punch the air as they chant slogans during a rally at Kim Il Sung Square in downtown Pyongyang, North Korea. Tens of thousands of North Koreans turned out for the mass rally at the main square in Pyongyang in support of their leader Kim Jong Un's call to arms. Jon Chol Jin/AP
North Korean leader Kim Jong-un (c.) presides over an urgent meeting of the Korean People's Army Strategic Rocket Force at the Supreme Command in Pyongyang. North Korea put its rocket units on standby to attack US military bases in South Korea and the Pacific, after the US flew two nuclear-capable stealth bombers over the Korean peninsula. KCNA/Reuters
North Korea's Unha-3 rocket lifts off from the Sohae launch pad in Tongchang-ri, North Korea, Dec. 12, 2012. North Korea vowed to strengthen its defenses amid concerns the country may conduct a nuclear test as a follow-up to last month's long-range rocket launch, citing US hostility. KCNA/AP
Soldiers of Kim Il Sung Military University perform military training March 6, 2013, in Pyongyang, North Korea. North Korea's military is vowing to cancel the 1953 cease-fire that ended the Korean War, straining already frayed ties between Washington and Pyongyang as the UN moves to impose punishing sanctions over the North's recent nuclear test. Kim Kwang Hyon/AP
South Korean Army's K-9 self-propelled howitzers fire during a military drill against possible attack from North Korea near the demilitarized zone that separates the two Koreas since the Korean War, in Inje, South Korea, Feb. 7, 2013. Lee Jong-gun/Yonhap/AP
A man looks at a map bearing the demilitarized zone (DMZ), which separates the two Koreas, at Imjingak pavillion in Paju, north of Seoul, March 11, 2013. North Korea has cut off a Red Cross hotline with South Korea as it escalates its war of words against Seoul and Washington in response to a military drill in the South and UN sanctions imposed for its recent nuclear test. Kim Hong-Ji/Reuters
North Koreans attend a rally in support of a statement given by a spokesman for the Supreme Command of the Korean People's Army vowing to cancel the 1953 cease-fire that ended the Korean War as well as boasting of the North's ownership of "lighter and smaller nukes" and its ability to execute "surgical strikes" meant to unify the divided Korean Peninsula, at Kim Il Sung Square in Pyongyang, North Korea, , March 7, 2013. Jon Chol Jin/AP
Former South Korean war veterans salute during a rally denouncing North Korea for vowing to conduct a third nuclear test in Seoul, South Korea, Feb. 6, 2013. New US Secretary of State John Kerry and his South Korean counterpart have agreed to make sure North Korea is punished if it carries out its threat to conduct the nuclear test. Lee Jin-man/AP
South Korean soldiers stand guard at the border village of Panmunjom in the demilitarized zone (DMZ) that separates the two Koreas since the Korean War, South Korea, Feb. 27, 2013. Ahn Young-joon/AP
South Korean navy sailors wave South Korean and US national flags at a naval port in Donghae, South Korea, March 9, 2013 as the guided-missile destroyer USS Lassen (DDG 82) arrives to participate in the annual joint military exercises, dubbed Key Resolve, between South Korea and the US. Yonhap/AP
Gen. Douglas MacArthur, in passenger seat wearing leather jacket, tours the newly opened Incheon Front in western Korea during the Korean War, Sept. 19, 1950. The Cold War still rages in North Korea, and enemy No. 1 is the US, which Pyongyang blames for making necessary its much-condemned drive to build nuclear weapons. US Army Signal Corps/AP