Reality check here folks - even the child-king infantile leader of North Korea is well aware that if he launched a nuclear warhead against the US or its allies, N. Korea would become dust that very same day. 
   This is how unnecessary wars are started - inflated rhetoric and twisting of facts. The reason North Korea wants this weapon, is because it ensures they will never be invaded. Of course, there is the p.i.ssing contest aspect of it, but this is incidental. 
   My main concern here, is the chance that NK will directly or indirectly facilitate the possession of a nuclear device by some non-country actor not concerned about the consequences of using it.