Satellite imagery taken after the US strike on Iran’s Fordow site showed smoke rising from the fuel enrichment plant. US President Donald Trump claimed key Iranian nuclear sites had been “obliterated,” while Iran claimed it had removed nuclear material from the sites before the strikes.
I thought we needed to use nukes to penetrate their nuclear sites. Either that was a lie or these attacks did not do what Trump is saying it did.
The US used 14 of their largest bunker busters (GBU-57) at the Fordow facility. That’s as close as you can get to nuclear without actual nukes. Source: https://www.theguardian.com/world/2025/jun/22/how-effective-was-the-us-attack-on-irans-nuclear-sites-a-visual-guide
Bunker busters only have about 2kg of payload, the rest of the weight is the penetrator body.
The bombs are rated at destroying a 20m radius.
There is some evidence that these penetrators can be guided away from targets by clever architecture. (A reinforced diamond cross-swcrioned concrete beam for instance can guide the penetrator away from its target)
Long story short we don’t know if these did anything.
Here is the presentation that talks about it https://youtu.be/TriASB-F5UY
for the lazy people: Wikipedia - GBU-57A/B MOP