years, over five presidents, that we don't know how many nuclear weapons they have. the estimates run yo from 20 to 60. and we don't know where all of their facilities are. we've got some pretty good hints about some of them. they have never allowed inspectors to go throughout the country. so this is going to become the most complex nuclear inspection regime that has ever been attempted anywhere in the world. it will be fascinate to go see how it works out. it will be fascinate to go see if kim jong-un is su happy with pele going through his country at that level. >> will, iant to get back to the human interests side. you pointed out their families were not there when they touched down on u.s. soil. is that unusual? do you have any thoughts on why they weren't there? >> i think the way that all of