They did this also under Clinton, Obama and a bit under Bush2 second administration when they got some concessions from DC. They turn it on and off like spigot. It is temporary. They will raise tensions again including new missile launches when they don’t get what they want, or want another payoff installment. Only a fool in his heart would think NK has really changed
They did not get concessions. They got to screen a movie trailer.
What concessions have we made to NK? U.S. and UN sanctions remain in place and our military remains stationed in S Korea, and NK did not receive planeloads of unaccountable federal money (or other blandishments) as a bribe.
I get the skepticism, but experts agree the Norks likely won’t have enough cash to continue paying the military beyond Sept or October. It’s possible NK walks away, but it will have lost tremendous face if it were to try and resume nuke testing.