Bunker buster bombs can go to varying depths depending on the model, from just under 2 feet with the BLU-109 to over 200 feet ...

The MOP was developed in the early 2000s as part of a DARPA-led effort created in response to the emergence of Iranian and North Korean fortified nuclear facilities.

Last weekend's strike on Iran's Fordow Fuel Enrichment Plant used 30,000-pound GBU-57 "massive ordnance penetrator" bombs. The design of those weapons and plans for attacking the site had ...

The video showed a GBU-57 series MOP (Massive Ordnance Penetrator) crashing into a target and kicking up a massive plume of dust moments before a blinding inferno appeared in a shaft during a test ...

This led to the development of the GBU-57, the Massive Ordnance Penetrator, designed specifically to defeat heavily fortified underground facilities.

A GBU-57 series Massive Ordnance Penetrator is seen crashing into a target. Picture: Department of Defense The 30,000-pound bunker-buster bombs demolish fortified targets deep underground.

A GBU-57 series Massive Ordnance Penetrator is seen crashing into a target. Picture: Department of Defense The 30,000-pound bunker-buster bombs demolish fortified targets deep underground.

Seven B-2 stealth aircraft dropped a total of 14 GBU-57 bunker-buster bombs on Iranian nuclear sites last weekend.

Chairman of the Joint Chiefs of Staff Dan Caine said the strike on Iran's Fordow facility was 15 years in the making.

When the analysts realized they did not have a weapon to strike Fordo if needed, Caine said they teamed up with industry in a top-secret effort to build the Massive Ordnance Penetrator, or GBU-57 ...