Comment by mikkupikku

Lot's of people have tried trading with North Korea, but they're politically unreliable. China and Russia both try obviously, but so has South Korea. These cooperations usually work for a while but eventually the unreliable reality of the North Korean government wrecks it for them. If it were all America's fault, as these sort of regimes always claim, they'd be able to get on well enough with their neighbors, but they can't.