Korea

The Koreas pose a very hard problem.  It appears (I think it is true) that North Korea sank the South Korean ship.  South Korea is assembling evidence and proceeding carefully before announcing the cause of the sinking (and something over 40 deaths).  Assume, as I think is the case, the evidence shows that North Korea is responsible.  What to do?  I do not see any course of conduct that suggests itself.  War would be close at hand and likely bloody, and would lead to tremendous refugee problems and humanitarian catastrophe in the North.  (The North is already a bad situation on that score.)  Can South Korea really just leave it at a denunciation?  While I would expect the North to use that internally to advantage, what about denunciation would suggest a reason for not later repeating the attack?  What was the thinking in the North?  Sanctions?  This is a very hard situation to sort out.  Harder than anything else I think on the international scene.  It is also interesting how muted the coverage is here -- I would have expected there to be a good deal of close coverage.