force. but leaving north korea with nuclear weapons is very troubling. general dunford the chairman of the joint chiefs of staff said last summer in aspen that he was asked isn't it unimaginable we would use force on the peninsula and general dunford replied what's unmanageable to me is that we would leave north korea with a capability of dropping a nuclear weapon on denver. >> jon: we have the prospect of some kind of an agreement the north koreans can you name an agreement that they have signed that they have lived up to? >> not one. fred aclay, a former director of the arms control agency, a well known academic once said the north koreans were capable of boundless mendacity, his phrase. that's why i think this conversation doesn't need nine or 12 months of low level diplomatic preparation. i think it is the kind of conversation you can have very directly right at the top. are you ready to do you nuclearize or should we just