will be lifted until complete denuclearization happens. nic robertson has the story live in seoul. what have you learned, nic? >> reporter: good morning, alisyn. a strong push back from secretary of state mike pompeo with journalists on the issue that the joint document that was signed by president trump and kim jong-un didn't include the words verification or irreversible. mike pompeo saying very clearly it was understood by all sides that complete implicitly meant therefore i or reversible and verifiable and said any thought to the contrary was ludicrous and insulting. contrary to what the north korea an people are hearing in their media that sanctions could come off as a result of the progress of negotiations and talks, they are mentioned on their side of denuclearization, mike pompeo