U.S. Deploys 2,000-lb Bunker Busters Against Arms Depot

Early on Tuesday, March 31, 2026, the U.S. military executed a massive aerial strike on a strategic ammunition depot near Isfahan. Citing U.S. officials and satellite verification, reports indicate the use of 2,000-pound (900kg) GBU-31(V)3/B bunker buster bombs—precision-guided penetrator munitions designed to destroy hardened underground targets.

Mount Safa Munitions Complex

The strike targeted what is believed to be one of Iran’s largest conventional weapons storage sites:

• The Impact: Footage shows a series of blinding flashes followed by massive secondary explosions, indicating that the bunker busters successfully breached the underground storage of missiles or high explosives.
• Geographical Significance: The site is located near Mount Safa, a heavily fortified area known to house the 14th Imam Hossein Division’s logistics.
• Nuclear Context: While Isfahan is a central hub for Iran’s nuclear program (including the Isfahan Nuclear Technology Center), both U.S. and IAEA sources suggest this specific strike avoided radiological facilities, focusing instead on conventional military “war-waging” assets.

Trump’s “Message” via Social Media

U.S. President Donald Trump amplified the psychological impact of the strike by sharing an uncensored video of the explosions on his Truth Social platform:

• Strategic Signaling: The move was described as a “strong message” to Tehran, aimed at demonstrating the futility of burying military assets deep underground.
• The “Midnight Hammer” Doctrine: This strike follows Trump’s recent threats to obliterate Iran’s remaining military and energy infrastructure if a diplomatic breakthrough is not reached shortly during the ongoing Islamabad Peace Summit.

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