And I think they realize that the other five countries are lined up against them, because all five are opposed to North Korea having nuclear weapons.
Any agreement that you have isn't going to be based on North Korea's intentions or trust.
Now North Korea certainly is located in a different place geographically, but I think it faces the same type of strategic decision. Does it want a different future for its people?
The other countries did not share the same concern the United States had in the early '90's - that North Korea actually had an ongoing nuclear weapons program.
There is a different future that is available to North Korea, if they choose differently.