development that the iaea is calling a cause for serious concern, deeply troubling. i would say, michael, the fact that they're doing it deliberately, somewhat out in the open, shows that north korea wants the united states to see this. sources are telling us the north koreans are frustrated because they think that they are not high enough on the priority list of president biden's administration, which of course is dealing with the crisis in afghanistan, the stalled iran nuclear deal, not too much escalating conflict with china. north korea wants to be higher up on the list, and yet according to a source speaking to cnn, north korea has actually not responded to several emails sent by the biden administration saying that the emails were not specific enough, that the u.s. didn't list agenda items to try to move the conversation forward from the one deal that was signed between former president trump and kim in singapore. and so certainly a complex diplomatic web to untangle just adding to president biden's list, michael. >> all right.