the unveiling in this meeting in north korea of new special representative for north korea policy. so i think that is another aspect we are watching closely. >> if it is two years and you are six months into discussions and north korea has made no step as required as defined by the trump administration, they said complete, verifiable, irreversible de-nuclearization, if that is the timeline why should folks have confidence that this is going to move forward in a positive way? >> i think it is an aspect of a political process. when you look at the definition of the principles and some of the understandings of de-nuclearization there is a technical interpretation and a political interpretation. i think the idea that it would take time and there would be the up and down aspect is a critical element of the summits. for the technical issues themselves, there is an interesting carrot that was offered not too long ago.