Bunker-buster bombs from U.S. defective?

Israel is seeking clarifications from the
United States to ensure that bunker buster bombs
it recently purchased are not carrying defective
fuses that could cause their premature detonation.

The laser-guided bomb, GBU-28, weighs about
5,000 pounds and is reportedly capable of
penetrating 100 feet of dirt or alternatively 20
feet of concrete. The bomb was initially
developed in the 1990s to penetrate hardened
Iraqi command centers located underground.

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