MOP (Massive Ordinance Penetrator) or GBU57 'bunker buster' bomb

The MOP (Massive Ordinance Penetrator) or GBU57 'bunker buster' bomb that was dropped on Iran this morning costs around US$3.5 million each. The bomb can penetrate 200 feet (60 meters) of hardened concrete before exploding. It can possibly penetrate deeper through regular soil.

Reports say that SIX of these bombs were dropped by the Americans on Fordow. Only two bombs are sufficient to destroy the nuclear installations below ground but they dropped SIX of them. Maybe they wanted to avoid having to come back again in the future. Some reports say that cruise missiles were also fired into Iran from the sea this morning, possibly from submarines or surface ships. 

One B2 Stealth bomber can carry two of these 14+ metric tonne bombs (30,000 lbs). So THREE B2 Spirit bombers must have attacked Fordow. It is likely that the other sites in Natanz and Isfahan were hit by two bombs each - requiring just one B2 bomber each (making a total of FIVE B2 bombers for this operation).  

UPDATE: THE STRIKE PACKAGE DID NOT TAKE OFF FROM DIEGO GARCIA. MY BAD. 

• The B2s took off from Whitman Air Force Base in Missouri
• It was called Operation Midnight Hammer
• Another decoy package took off and headed west over the Pacific.
• The main strike package of 7 B2 Stealth bombers went east over the Atlantic.
• They flew for 18 hrs to reach Iran.
• A US submarine launched > 24 Tomahawk cruise missiles at Isfahan.
• 2:10 AM Teheran time the first TWO bunker buster MOPs dropped on Fordow.
• 14 MOPs in total were dropped over two nuclear sites.
• This means Fordow was hit by between 6 - 12 bunker buster bombs. 
• All 3 nuclear sites were struck between   2.10 AM - 2.35 AM (25 minutes).
• Isfahan was the last to be struck - by those >24 Tomahawk cruise missiles.
• A total of 75 weapons were used - 14 bunker buster MOPs, >24 Tomahawks etc.
• More than 125 US warplanes were involved
• There were no shots fired by Iranian air defenses at all.
• This was the first use of the GBU57 MOPs in combat
• The operation was planned over weeks. 
• The attack was already preplanned.

This means that the decision for the United States to bomb Iran had already been made before April 2, 2025. Long before Israel even attacked Iran on June 13th 2025. The whole thing had been planned.

Here is a quick video about the 30,000 lb bunker buster bomb.