No. North Korea does not have an economy that provides enough food for its population. The North Koreans and the South Koreans have basically the same genetic makeup, yet a North Korean who is 18 years old is five inches shorter than a South Korean of the same age. Keep in mind that those soldiers you saw at the DMZ are the biggest and toughest and strongest that they have.
On October 25th, 2012. See this statement in context.