>> Seoul and Washington leading a mission to pile the pressure on Pyongyang, prodding North Korea's Cold War allies to get more involved as it pursues nuclear weapons in the face of UN sanctions. But that's not to say the North's old friends have been sitting on their hands. In fact, ever since the UN toughened sanctions in March, many have taken measures to further isolate the country.
Angola which is suspected of buying military equipment from Pyongyang, has banned all North Korean companies. And Poland has stopped hiring North Koreans sent to work overseas, an important source of income for Pyongyang. Singapore and Ukraine have said no more visa-free travel for North Koreans. And some countries are striking Pyongyang's merchant ships off its registries.
North Korean ships are widely suspected of using other flags to hide illegal trade. Now countries like Mongolia are taking those flags away, forcing nearly 70 ships to de-register around the world since March. With Seoul and Washington's prodding, these one-off measures are likely to increase. But there is another old ally which hasn't responded, Beijing.
And since the vast majority of North Korea's trade today is with China, analysts say until that old friend joins the team, a sanction here or there isn't likely to make much of a dent.