[freepersup]

I’m not buying a bomb/missile burrowing 1,200’ underground.

[Robert DeLong]

A nuclear one will go close to that depth, but no way a non nuclear one will go even close to that depth:

Using the 1.2 megaton B83 warhead—the highest yield weapon in the U.S. nuclear stockpile—could crush underground bunkers to a depth of about 1000 feet.

Source: 4th paragraph down