[tus666]

260ft is around 79m. The bombs can penetrate around 60m of concrete. So one bomb, probably not, but they are able to follow each other in quick succession meaning 2 or three should be able to do the job quite easily, with accurate GPS positioning.

[missedthecue]

They can penetrate 60m of soil. They cannot penetrate 60m of concrete. Reinforced concrete at about 5000psi would only get penetration of 8-15m.

The facility is beneath 80m of limestone which in the Qom formation is roughly equivalent to about 5000psi concrete.

Beneath the limestone, sits the facility itself which is encased in high performance concrete. So these bombs need to pen 80m of 5000psi material and then a unknown depth of high performance concrete.

[reissbaker]

There is no public information about what kind of material 60m refers to, and the best guesses of reinforced concrete are 18m. https://en.m.wikipedia.org/wiki/GBU-57A/B_MOP While a single bomb would be insufficient, you don't need that many to get to 80m.

And US military assets are often much more powerful than publicly advertised...

[jen729w]

Also, surely – I have no expertise – but you don't need to totally destroy the bunker to render the operation basically dead, right?

The land, roads, ingress points, elevators, security, everything around here is now FUBAR. Okay so you didn't "destroy the bunker", but how many years until it's functional again?

[400thecat]

you don't actually need to completely destroy all the underground levels in Fordow. It is enough to cause enough damage so that the stored uranium contaminates the site, while being sealed from the outside world under the collapsed site.

[adastra22]

There is uranium stored there. It was moved out weeks ago.

[margalabargala]

Media is reporting that 12 were dropped on Fordow

[sdenton4]

The bombs don't dig a hole, removing all matter for the next bomb to dig its way deeper...

[jandrewrogers]

The point is not to dig a hole. Penetration depth is a function of compression strength of the medium. Every bomb leaves a path of debris in its wake with negligible compression strength that subsequent bombs can pass through before expending their energy.

[lonelyasacloud]

There were an estimated twenty of these bombs in existence before the bombing; very little head room for throwing more of them down the hole if they haven't done the job.

[shmoe]

ahh.. in my mind it was multiple hits spread over an area. This does make more sense.