Washington is on the brink of dropping its largest non-nuclear weapon on Iran. The Pentagon is actively exploring the use of the GBU-43/B Massive Ordnance Air Blast (MOAB) against Iranian energy infrastructure and nuclear facilities, according to officials familiar with the plans cited by CNN. This would mark a massive escalation in a conflict that has stalled since US-Israeli strikes began in February.
The strategic value of the bomb is fiercely debated inside the military. The MOAB has never been used against Iran. Its deployment would signal a dramatic shift in tactics, yet questions linger over whether it can deliver the strategic gains Washington seeks. One source familiar with the planning told CNN that the weapon's capabilities might fall short against deeply buried targets. "The MOAB is a massive information operation type weapon that is great for huge area clearance but not much else," the source said. "It is definitely not designed as a deep penetration warhead."
The plan appears as much about optics as it is about destruction. Military officials have discussed options that could provide a dramatic show of force, described by one source as a potential "fireworks show." Such strikes could offer President Donald Trump a way to step back from the conflict, even if they fail to achieve the original war objectives of preventing Iran from developing nuclear weapons. The US and Israel have defended the campaign as necessary to stop Tehran, while Iran has repeatedly denied seeking nuclear capabilities.
Diplomatic efforts remain at an impasse. Washington has recently shifted toward economic pressure, scaling back military operations, but the threat of renewed strikes looms. This deliberation coincides with Trump facing significant political pressure ahead of the November midterm elections. Polls indicate that the unpopular war and resulting fuel price spikes are hurting his Republican Party. A fresh offensive carries consequences beyond the battlefield, particularly if it fails to produce a decisive outcome and risks civilian casualties.
The MOAB’s combat history is limited. The US military first deployed the weapon in Afghanistan in April 2017, during Trump’s first term. The strike hit Islamic State hideouts in a network of tunnels and bunkers, killing more than 90 militants. Trump authorized that use, making him the first US president to deploy the arsenal’s largest non-nuclear bomb. Whether he chooses to repeat the action against Iran remains undecided.