webster a state or period of senile decay. the term is centuries old. shakespeare using it. if nothing else kim jong un proves there's never a shortage of put downs. all right. now i will go to joe who is an expert on all things nuclear weapons and north korea. i want to ask you on the latest here, this latest sort of toe for to if you will between president trump and kim jong un. he called him a dotard. how concerning is it for you, joe, that the rhetoric continues to ratchet up. ? >> i'm in consultation with a