More and more news you hear out of the 'Kwa used to be the sort of stuff you'd expect to hear from some undeveloped government in Africa.
Apparently upon doing the first thorough inventory of their nuclear arsenal in ten years, the Kwandans have discovered thousands of sensitive nuclear components unaccounted for.
They've got the plans, so all they needed was the parts
If your little nation had the means to build a nuclear weapon and knew it might be the only defense against the Kwazy Kwanzan Invasion-Of-The-Week and you also knew that by adding 12 pounds of cobalt you could turn your little nuke into an area denial device for the entire Kwanzan army for a hundred miles, would you add 12 pounds of cobalt? Vault-Co figured out the correct answer to this question ten years ago.
Nobody puts Pandora back in the box. For any nation to consent to giving up their nukes in the current Kwanzific atmosphere would be tantamount to suicide. They'll stall but you'll never get a nation to the table if they have any sense.
Proliferation. It's what's for dinner. There's a strategy, however. It hasn't changed in sixty years. It's called civil defense.