North Korea - the forgotten frontier market

North Korea and South Korea have been in a suspended state of war for some time. Tensions with North Korea escalated in response to tension over the sinking a South Korean warship in March. North Korea, led by Kim Jong-il, is the last Stalinist dictatorship. It set off a nuclear device in 2006 and has since test-fired a ballistic missile. It now looks like the war could flare up again. President Lee said if his country's waters, airspace or territory were violated he would immediately exercise his right of self-defence. Barack Obama has ordered that the 28,000 U.S. troops in South Korea be put on alert.