I’m guessing that this mountain will implode - somehow, mysteriously.
And with it, the nuclear program of DPRK.
That will be interesting.
The world is being set up with this story.
The mountain has been compromised by DPRK nuke tests. The mountain implodes, blamed on DPRK nuke tests. No more DPRK nuke program.
International cleanup required? Who knows, maybe. More “reason” to stop the DPRK nuke program.
Unfortunately, even if they can't fix the test site, NK has lots of mountains. A delay in the weapons program may just make USA action less urgent.