I don't think the US should mess around anymore. If North Korea tests one more nuclear weapon.. sends off just one more mid or long range missle.. I believe the US should show North Korea just how much We have advanced since 1953. We may not want to show off to China all that we have. We may not have to. If China has finally realized just how insane their step child has become.. they will stay out of it. I know the US has policies over assasinating foreign leaders... that being said I would drop millions of pamphlets letting all North Koreans know that it would be a bad idea to be within a mile of Kim Jong Un. For the next few months. The US could take out every single missle system just north of the 38th parallel in about 15 minutes.