&gt;There hasn&#x27;t been much trouble getting other countries to put pressure on North Korea.<p>...other countries except China, the important one.  North Korean products (legal plus things like drugs and counterfeit cash and weapons) are shipped overland and out through China&#x27;s ports.  The Chinese sell oil to North Korea at below market rates.  Plus luxury items for the people in charge.  If China decided to play ball the North Korean government could not survive.