BLU-109 is what we needed

 The BLU-109 bunker buster hardened penetration bomb used by the USAF is designed to smash through concrete shelters and other hardened structures before exploding. The BLU-109 has a 25mm thick steel casing, filled with 240 kg of Tritonal. It has a delayed-action fuse. America has given us a few of them so we may destroy Iran's nuclear factories.