Two words: Ground Zero.
the old bunker busters were good to 1000’ below ground. I wonder how the new and improved version does.
Killing the little buggers is certainly desirable and useful, but all we have to do is destroy the ventilation system and collapse the exits. Let them suffocate in their tombs. It is also gratifying to complate what would happen to all that fissile material left unattended while the Iranians try to dig it out.