North Korea is not trying to get a nuclear bomb, they've already got nuclear bombs and have for more than 10 years. This is why I'm confused. They're also not

North Korea is not trying to get a nuclear bomb, they've already got nuclear bombs and have for more than 10 years. This is why I'm confused. They're also not the only examples of dictatorial states getting nuclear bombs - surely the Soviet Union and China are earlier examples of that.