There are 2 types of 30,000 bombs, one above ground explosion, one ground/cement penetration delay fuse , both GPU.
Only the USA has the planes that can deliver 30,000 pounds, The B-2 can carry 3 (90,000 pounds), all with GPU AND delay fusing.
So that they hit the same hole/each detonates a milli second later for maximum penetration !
1,200 feet of dirt, or 600 of dirt AND 120 feet of concrete.
DG has 7 B-2 on their runway, unknown 30,000 pounders.
B-2 are stealth, show a golf ball radar return at 35,000 feet. Bombs internal bomb bays. Legs to anywhere in Iran, refuel somewhere back to DG OR USA.