We just need another Jap soft target but miscalculation this time lands the missile into the Jap north island instead of over them. It will as usual sends the jap cabinet into emergency meeting then demand UN takes stronger action. Unless they can suck the air out of NK creating a vacuum, the ball game is 'who can continue to press the missile button'.
Or we have the other scenario, the US bombers miscalculate course and stray into NK airspace blown out and pilots captured. Pilots strapped onto the next missile fired across to Guam and for once the US hopes it lands on their territory. If the NK are smart, they would provide the pilots with oxygen while in stratosphere.
