Such bunkers have to have a way in and out...
That is correct Pox. There is a way in and out. Power gets in.
Why don’t the smart ones in the Pentagon just plan for destroying the power source. It takes alot of juice to run that operation, especially the centrifuges. they are piping in electricity, or generating it on site. Destroy the fuel and electric lines along with the sources. When they fix it, watch them with the eyes in the sky and destroy it again, and again.
You could do that the old fashioned ways, carpet bomb it, or with a deluge of cruise missles.
Well put! If all access was destroyed how long would it take to remove several hundred feet (if not a thousand) of rubble? And how long before the air and water are used up?