NK is NOT going to put down it's nukes and walk away. What idiot in the State Dept or in the WH think they will? Offer all you want... they'll lie if they think it's worth the effort but ultimately they will keep their nukes.
Simple truth always eludes self-proclaimed "complicated minds.":-)
IMHO NK will eventually give up their nuke program. However, they will do it by telling us they are dismantling it and will instead sell their weapons to the highest bidding mideast terror group.
As a diversion, Kim will step aside, let NK devolve into turmoil and Kim will take the billions and flee to some European country where he will live out his life in pure decadence.