Was 15 kilotons. World leaders issued rapid responses. President barack obama called the nuclear test a grave theft. The japanese Prime Minister said it was absolutely unacceptable. The president of south korea called kim jongun fanatically reckless. They are holding a closed door meeting in the Yunited Nations N two hours. We are joined by will, lisa and victor, joining us from washington. Will, you have been to north korea several times over the last few years. Probably more than any other western journalist. What is pyongyang up to . Kim jongun, when i was last in north korea in may solidified his power and lined up his leadership to develop north Koreas Nuclear program at a dizzying pace in the last several months and weeks. In addition to this nuclear test which caused a 5. 3 magnitude earthquake, still yet to are verified by the u. S. , still testing radiation levels, three missiles launch from the ground capable of hitting here in japan. The week before that, there was a submari