If the North Koreans cave in to the US does it not threaten the end of the current regime? - and reaching the end in that country has a history of full and total finality. So would it not make sense to go out with a bang? - meaning a string of nuclear bangs hitting South Korea, Japan, US bases and maybe more? Hundreds of millions might die.  And it won't be good for the markets anywhere. It won't even be good for Trump in US polls. It isn't just the North Koreans whose logic worries me.