I've been saying for months now that as soon as NK perfects their nuclear weapon capabilities they ARE going to launch. KJU is crazy enough to do it. I know they'd prefer to launch a missile(s) against the US but since SK is their closest ally that will be the likely first target. NK has no intentions of denuclearizing, so regardless of who launches a pre-emptive strike it's only a matter of when, not if, it's going to happen.