B-52's can also drop bunker busters.
Yes they can. But the Press is making a big issue of B2s leaving their homes last night and redeploying to the ME. I am guessing that President Trump is doing a ‘sleight of hand’ on Iran to have them focused on the VBBs (Very Big Bombs), while Israel’s Unit 505 is preparing to breach Fordow. But it is just a guess, so we will see. I doubt that Iran has the two weeks they think they have. Trump said “Within two weeks”, which from him means from the next twenty seconds and two weeks.
BGU-57 is B-2 only And it is the deepest penetrating bomb.