[PghBaldy]

Libya & South Africa & Ukraine gave up nukes or programs, IIRC.

[SmokingJoe]

Libya had a nuclear program but no nukes. South Africa got black majority rule from the whites. The blacks did not feel the need to use nuclear weapons to protect themselves from their black neighbors like the whites did.
Ukraine's nuclear weapons belonged to the Soviet Union and the Russians got all the Soviet nukes, including the nukes stationed in former Soviet states like Azerbaijan and Kazakhstan. None off these apply to North Korea.

[Lent]

‘Libya’

Really helped Gaddafi in the long run didn’t it? Arab Spring and being dragged through the streets and shot with Hillary laughing her approval.