Ok, here is a theory... nK did not, I repeat, did NOT detonate a nuke this past weekend. That the explosion was used with conventional bombs to simulate the effects of a nuke.
They would do this inorder to see what the world reaction would be. The close in strategy would reveal our hand and by the time that we figure out that it was in fact not a nuke, everyone testing and developing nukes would see what the world reaction would be.
These guys are testing the waters to see world reaction.
Any takers on this theory?