[maine yankee]

My understanding is Iran uses a special type concrete. Harder than the norm. Built to withstand earthquakes. Natural and “man-made...”

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Did they use the ‘super-dooper’ ceement on the roads, bridges, and tunnels into the complexes as well ?

Did they use it on the housing complex of the troops protecting the complex ?

[St_Thomas_Aquinas]

Maybe they used more rebar.

[donozark]

Maybe the troops are bivouacked underground as well? Approaches can be bypassed.

Point is, over reliance on aerial assets can be costly in terms of accomplishing the mission. Otherwise the capture of the Mountain of the Crouching Beast would have been a cake-walk. The Tunnels of Cu Chi would no longer be a tourist destination. And they were but earthen works...UHPC seems to have caught the interest of the Pentagon. Sure the IDF has not overlooked it either....