Despite some progress made, critics say six-party talks launched in 2003 were unwieldy and exploited by Pyongyang
All sides in the North Korea crisis agree there are no good options. Sanctions, the most complex ever designed by the UN, are of limited effect unless an oil embargo is imposed – in which case the whole country slides into chaos, something China opposes. A military assault is likely to lead to reprisals and mass casualties that would dwarf Hiroshima.
Link : Why a return to diplomacy over North Korea has few takers