It's always funny to read western news about DPKR and them developing nukes as if SK and the US don't arrange invasion drills every other year ramping up for a full scale war.

Yeah, they figured out the best way to defend themselves is to make damn sure that if they get invaded then the countries invading them suffer a lot. Nukes are a really good way of doing that. I'd say it's not rocket science but that'd be a terrible joke.