the trump people early on. when they took the power in 2017. they said north korea topped their list of concerns. i talked to folks on the national security team who talk about north korea and the lack of good alternatives. secretary mattis said this is a diplomatic process. nothing is off the table. but is a dialogue and discussion better than the alternative? that's what the national security team is in this administration kept returning to. >> we have the document that shows the four points they agreed upon. we see the president and the north korea leader signing. essentially what's key here is that the president of the united states committed to provide security guarantees to north korea. kim jong un reaffirmed his unwaivering commitment to complete denuclearization of the key yan peninsula. it goes on with the four points. reaffirming the work towards denuclearization. committing to recovering pow mia