[bigyabai]

Well, for all the wanting of nonproliferation it didn't stop Pakistan or India. I never saw any peacekeeping operations from China or Russia when either of them went nuclear.

If Ukraine had the physics package, why couldn't they deploy it? Barring launch codes from the Kremlin, there's still enriched uranium in the warhead that you can turn into a simpler one-stage bomb. I doubt they could have gone thermonuclear, but simply leveraging the ICBMs and fissile material seems well within Ukraine's wheelhouse.