North Korea obviously has a better manufacturing capacity then we have been led to believe.
I don’t buy that North Korea is a “third world” country.
I think a lot of what the public knows about North Korea is propaganda.
The Norks are heavily in bed with both Pakistan & Iran. They could have easily bought what pieces (If not the whole assembly!) they needed from either or both places.
Well, South Korea is technologically advanced. All North Korea had to do was kidnap, blackmail and/or hire people...from the country next door.