obviously, every 'military' approach to north korea looks impossible or disastrous. this is the only regime-change scenario i can picture: u.s. and south korea, perhaps with a un nod, approve an extremely sudden invasion and annexation of north korea by china. i'm sure that would make south korea nervous, but they can and do deal with china, and actually south korea's security would be extremely enhanced. i'm not endorsing this, i'm just saying that this is the only realistic way that the threat could be eliminated.
i think china has probably already run the scenarios; they just cannot want hydrogen bombs blowing up nearby, etc. then we'd have to work an international aid package, almost compensation. i'm not sure why no one is talking about this when all military action by the us looks impossible or disastrous.