The size of the sites they need to make the nukes are not small. It's more a matter of Intellegence knowing whats going on there. The issue with NK, to my unde

The size of the sites they need to make the nukes are not small. It's more a matter of Intellegence knowing whats going on there. The issue with NK, to my understading, is that any action there would lead to SK ( A densely populated country) being attacked with a lot regular missiles that would be hard to prevent.