disclosed. zuckerberg made sure to call senator warner personally with his change of heart. david. >> joining us is secretary of state rex tillerson. great to have you here. >> pleasure to be here. >> let's dive into the news. first on russia and then south korea. first of all we have president trump with the tough, new sanctions. his tweet. kim jong-un already saying that he's considering the strongest actions. i want to break this down for people at home. they already tested a bomb more powerful than what we saw in world war ii. they've tested several intercontinental ballistic missiles. overnight they were talking about the detonation of an h-bomb in the pacific. how do we stop them? they have done everything they said they were going to do already? >> well, david, we are quite challenged but our diplomatic efforts are continuing unabated. we have put in place the strongest economic sanctions to ever have been assembled against kim jong-un so he is being tested with the...