The United States is considering its largest non-nuclear bomb as an option against Iran, according to a CNN report published on Thursday. The discussions come as President Donald Trump weighs whether to resume military action in a war that has settled into a stalemate.
There is no confirmed decision. The report rests on officials familiar with the planning, and the weapon has never been used against Iran. If it were deployed, it would mark a significant escalation. Even so, questions remain over whether it could deliver the strategic gains Washington is seeking.
What the Pentagon is reportedly considering?
According to CNN, citing officials familiar with the plans, the Pentagon has been exploring the possible use of the GBU-43/B Massive Ordnance Air Blast, widely known as the “Mother of All Bombs” or MOAB. The reported targets include Iranian energy infrastructure and nuclear facilities.
Can the MOAB reach Iran’s nuclear sites?
Despite its enormous destructive power, the MOAB may not be the right tool for Iran’s suspected underground nuclear facilities. One source familiar with the plans told CNN that the weapon could fall short against deeply buried targets.
In the source’s words, it is “great for huge area clearance but not much else,” and “definitely not designed as a deep penetration warhead.”
That matters for the larger picture. If Washington’s main objective is still to stop Iran from developing nuclear weapons, a bomb that cannot reach hardened underground sites may not change the course of the war. The US and Israel have defended their campaign as necessary to prevent Tehran from acquiring nuclear weapons. Iran has repeatedly denied seeking them.
A “show of force” rather than a decisive blow?
CNN also reported that military officials have discussed options that could deliver a dramatic show of force without necessarily achieving the war’s original objectives. One source familiar with recent planning described some proposals as a potential “fireworks show.”
Such strikes, the report suggests, could give Trump a way to step back from the conflict, even if the goals set at the start of the war are not met.
Diplomacy stalled, pressure shifting
The deliberations come while diplomatic efforts to end the fighting remain stuck. The conflict began in February with US-Israeli strikes on Iran, and negotiations have reached an impasse. In recent weeks Washington has also moved toward economic pressure and scaled back military operations.
The political backdrop
The debate is unfolding with the November midterm elections close. Trump’s approval ratings remain low, and polls cited in the report indicate that the unpopular war and the resulting rise in fuel and other prices are hurting the Republican Party.
A fresh round of attacks that fails to produce a decisive outcome could therefore carry consequences well beyond the battlefield. The report also flags concern about civilian casualties if a weapon as powerful as the MOAB were used against Iranian targets.
Background: the MOAB’s only combat use
The US military first used the MOAB in combat in Afghanistan in April 2017, during Trump’s first term. It was dropped on Islamic State hideouts in a network of tunnels and bunkers. Reports at the time said more than 90 militants were killed.
Trump authorised that strike, making him the first US president to deploy the largest non-nuclear bomb in America’s arsenal.
Frequently asked questions
Is the US going to use the “Mother of All Bombs” on Iran?
- Not confirmed. CNN reported that the Pentagon is exploring the option and that President Trump is weighing whether to resume military action. No decision has been announced.
What is the MOAB?
- The GBU-43/B Massive Ordnance Air Blast, known as the “Mother of All Bombs,” is the largest non-nuclear bomb in the US arsenal.
Has the MOAB ever been used in combat?
- Yes, once. It was used in Afghanistan in April 2017 against Islamic State hideouts in tunnels and bunkers.
Can the MOAB destroy Iran’s underground nuclear sites?
- A source cited by CNN said it is not designed for deep penetration and may fall short against deeply buried targets.
When did the Iran war begin?
- The conflict began in February with US-Israeli strikes on Iran. Negotiations have since stalled.
Source: CNN report published on Thursday, 15 October 2026. This article is based on that reporting and officials’ accounts cited in it.
