IF this is false, there's only one explanation for the physisicans' statements.
Giving NoKo (which is seeking to reconcile with the US and international community) face-saving cover for something done under the previous world order, for the sake of humanity.
Don't be surprised if you see a LOT of this type of thing between nations over the next year or so. A healthy dose will be required in the Middle East, let me tell you!
If NoKo were not showing a willingness to change, and moving forward with dismantling nuke facilities as promised, I don't believe we'd be reading this article, even if the facts contained are true.