Well, the Soviets gave SCUD technology to the Red Chinese, who called them Silkworms among other names, and then the Reds gave them to the NORKs, who tinkered and improved them and now call them, and I’m not kidding, Dongs. As in the intermediate ones are Short Dongs, and the longer range ones are Long Dongs. Being Koreans, I heard they have a lot more short dongs than long dongs!
Seriously, though, they’re leaps and bounds better than what the Iraqis launched back in the early 90’s. And they are mobile. I’m not sure but I do not think the NORKs have any permanent sites except their test launch facilities. I’m afraid most will be in tunnel mouths or hidden in camouflaged deep valleys right before launching.
I think our Patriots and THAAD can take out a bunch. All? No.
Given our vast unspoken "eye in the sky" capability;
Unless they hand carried every little piece of each missile, into these locations, at night, under cloudy conditions, and assembled them in place...I'm pretty sure they left tire tracks, broken/fallen trees, or some kind of evidence of their activity near the placements.
And I'll bet we've been watching them for a long, long time.
You?