overnight. there's an escalation. how concerned are you with this? >> i think this is the most serious crisis we've had with north korea in some years. i think it comes at a time when there's so many other international crises that it's especially troubling. we'll see more and more tension on the way to the bali summit where xi jingping, president biden, perhaps president putin from russia will all be meeting in the middle of the month. i wonder if that is the reason that kim jong-un is choosing to create the crisis now. he wants more attention. he's been out of the limelight while other crises took first rank and so he's jumped back in. unusually strong language was used by the u.s. secretary of defense lloyd austin yesterday in speaking about this threat. he said any use of nuclear