down. >> 5:36 punishment their in seoul. ian lee live for us in seoul. north korea has evolved from a regional menace to a global threat. strong words from the head of the atomic energy agency. he calls sunday's test of what pyongyang claimed was a hydrogen bomb a new dimension of threat. for more on the diplomatic efforts to cool tensions on the peninsula, let's bring in nic robertson live from the iaea in vienna, austria. tell us what the head of the iaea said. >> reporter: this man knows the region, knows the korean peninsula well. and of course the position that he's in as the head of the iaea puts him in a position to be very, very well informed as well as being an expert on nuclear developments to understand what's going on. i asked are we not at the point in time where effectively north