The Wall St Journal reports the Pentagon spent $330 million to develop 20 fifteen ton bunker buster bombs. Wow.
That's $16.5 million per bomb.
Bunker busters are nothing new. British genius Barnes Wallis invented the first one back in WWII. Wallis' "Tallboy" weighed six tons, and the later "Grand Slam" weighed ten tons, the heaviest that 1940's aircraft could get off the ground. These bombs have a very strong steel casing and when dropped from high altitude, they penetrate deep into the ground before exploding. The casing has to be very strong, in one case, old cannon barrels were used to make the bomb casings.
Nothing here to justify a $16.5 million price tag.
Looks like a good place for some defense budget cuts. Better here than cutting 89,000 soldiers and marines.