CNN reports 12 GBU-57s were dropped on Fordow.

Can I say again how deeply silly this munition is? What's special about a GBU-57 isn't its explosive force. It's that the bomb casing is made out of special high-density ultra-heavy steel; it's deliberately just a super heavy bomb with a delayed fuse. It is literally like them dropping cartoon anvils out of the sky.

From what I've read, the idea is that they keep dropping bombs into the same bomb-hole that previous sorties left, each round of bombs drilling deeper into the structure.