NK had nukes in the early 90s.

https://www.cnn.com/2010/WORLD/asiapcf/08/24/north.korea.carter.backstory/index.html

Carter’s 1994 trip to Pyongyang was successful in defusing the first North Korean nuclear crisis, paving the way for the 1994 Agreed Framework in which North Korea pledged to give up its nuclear weapons in return for aid.