“Coincidentally we were thinking of testing some bombs in North Korea also.”
Yeah, I hear that we have a few cruise missiles ready to “fly into “ that tunnel for a looksee.
I’m betting the launch point is exoatmospheric for our response.
Plausible deniability....
Nah...
Use the MOP (Massive Ordinance Predator)
30,000 lbs of bunker busting fun !