Very few, as North Korea hand picks everyone who gets to leave by essentially keeping their entire family hostage, and any “traitor family” will find them sentenced to life in prison/labour camp - including any children born in those camps.
And they are places you wouldn’t wish for anyone to end up in, especially your loved ones.
Sci-fi has made me believe something small going that fast would just punch a nice clean hole through anything it hits.
Now, I realize it most likely isn’t quite Hollywood clean, but the Resurs P is (was) basically the size of a small bus (8 by 3 metres) and 7000kg, so I’d imagine it would need to get hit by quite a big thing to cause it to actually properly explode.