China has wanted reunification since before the invention of the transistor.

A bomb penetrating 18m of reinforced concrete doesn't excavate 18m of concrete. It would weaken it by some percentage through fractures and overpressure but you'll need to pen it again with the second bomb.

The equipment in the facility isn't bolted into the limestone though. The facility is inside ultra high performance concrete and if the Iranian engineers had two braincells, dampening layers. They were building it for this moment after all.

GBU-57 reaches 200ft of soil and gravel. Not 200ft of 5000psi limestone typical of the Qom formation in that area of Iran.

By a wide margin, the majority of Iranian university students are women. The ratio is over 60/40