Pentagon seeking bigger conventional bomb to bust Iranian bunkers

The 30,000-pound “bunker-buster” bomb, known as the Massive Ordnance Penetrator, was specifically designed to take out the hardened fortifications built by Iran and North Korea to cloak their nuclear programs…

Doubts about the MOP’s effectiveness prompted the Pentagon this month to secretly submit a request to Congress for funding to enhance the bomb’s ability to penetrate deeper into rock, concrete and steel before exploding, the officials said.

The push to boost the power of the MOP is part of stepped-up contingency planning for a possible strike against Iran’s nuclear program, say U.S. officials.

The Defense Department has spent about $330 million so far to develop about 20 of the bombs, which are built by Boeing Co. The Pentagon is seeking about $82 million more to make the bomb more effective, according to government officials briefed on the plan.