We Kno how to do a decapitation attack to eliminate the NK leadership. May day we nuke Pyongyang during the height of there May day parade. The city would be leveled including most of the leadership including Kim. This would have to be followed with taking out there nuke and launch facilities that same day. This would cripple NK and lead to instability which the Chinese would have to step in to the void. This might create more problems than doing nothing though as we would be in direct confrontation with both China and Russia at that point.
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