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Defence & Security16 Oct 2026 · about 6 min

White House prepares plans to use "mother of all bombs" on Iran

The brief

The most important distinction is between planning and ordering. The White House and Pentagon prepared plans for using a Massive Ordnance Air Blast bomb against military sites in Iran. The article does not report that President Trump ordered an attack. It says the weapon could be used if he gives that direction. The plans cover a possible operation, not a confirmed mission. A Pentagon official described planning for many operational scenarios and for carrying out presidential and secretary-level direction. This means military planners are preparing options so forces could respond if leaders approve one. The current situation remains uncertain. Trump recently said the United States would not attack Iran before the midterm elections. He also mentioned productive conversations with Iran, without explaining them. The plans show preparation for a possible conflict, while the article provides no evidence that an attack decision has been made.

01

What exactly have the White House and Pentagon prepared, and does this mean an attack on Iran has been ordered?

The most important distinction is between planning and ordering. The White House and Pentagon prepared plans for using a Massive Ordnance Air Blast bomb against military sites in Iran. The article does not report that President Trump ordered an attack. It says the weapon could be used if he gives that direction.

The plans cover a possible operation, not a confirmed mission. A Pentagon official described planning for many operational scenarios and for carrying out presidential and secretary-level direction. This means military planners are preparing options so forces could respond if leaders approve one.

The current situation remains uncertain. Trump recently said the United States would not attack Iran before the midterm elections. He also mentioned productive conversations with Iran, without explaining them. The plans show preparation for a possible conflict, while the article provides no evidence that an attack decision has been made.

02

What is a Massive Ordnance Air Blast bomb, or MOAB, and how does it work?

A Massive Ordnance Air Blast bomb, or MOAB, is a very large conventional weapon designed to explode above or near a target. Its nickname is the “mother of all bombs.” The article identifies it as the largest U.S. non-nuclear weapon and says it weighs upwards of 30,000 pounds.

Its basic mechanism is an air blast. The weapon’s explosive force produces a rapidly expanding pressure wave after detonation, spreading through the surrounding air and striking structures and people over a wide area. Air detonation can distribute blast energy across exposed targets rather than concentrating it at one point. The article itself does not provide technical details about its explosive composition or blast radius.

The MOAB is therefore a conventional weapon, not a nuclear device. Its use would still be highly destructive, but the article gives no estimate of possible damage in Iran. Any effects would depend on the target and surrounding conditions.

03

How large and powerful is the MOAB compared with other conventional bombs?

The clearest measure is physical size. The article says the MOAB weighs upwards of 30,000 pounds, or more than 15 tons. It also calls the weapon the largest U.S. non-nuclear weapon. That places it at the extreme upper end of American conventional bomb design.

The article does not provide a precise explosive yield, blast radius, or side-by-side comparison with other conventional bombs. Still, its unusually high weight and stated status as the largest U.S. non-nuclear weapon explain why it attracts attention. The large body carries a correspondingly large explosive load and produces a broad air-blast effect.

The comparison has limits. “Largest” here refers to the U.S. non-nuclear weapon category, not to every bomb worldwide or to nuclear weapons. The article also lists a cost of $170,000 per unit. That figure describes price, not destructive power.

04

Why might an air-blast bomb be used against military sites such as caves or fortified facilities?

Air-blast weapons are suited to targets where a broad pressure wave may damage entrances, chambers, structures, or equipment. Caves and fortified facilities can protect occupants from smaller, more focused attacks. A very large blast may reach across exposed openings and transmit destructive pressure into connected spaces.

The key mechanism is the rapid expansion of gases from the explosion. That expansion creates a shock wave moving through the air. Against a cave complex, the wave can strike the surrounding terrain and tunnel openings, while heat and pressure may affect people or equipment inside. The article does not provide measurements or confirm the exact effects on fortified Iranian sites.

The historical example matters because the MOAB was used in 2017 against an Islamic State cave complex in Afghanistan. The article does not state the operation’s detailed military results. It presents that use as precedent for considering the bomb against military sites in Iran.

05

When and why did the United States use the MOAB in Afghanistan in 2017?

The article says the United States used the MOAB in 2017 in Afghanistan. The target was an Islamic State cave complex. This is the only specific past use identified in the source, and it provides the background for current discussion of the weapon.

The immediate reason given is the target itself: a cave complex associated with Islamic State. A massive air blast can be considered for difficult or protected sites because its pressure wave covers a broad area. The article does not explain the strike’s full military objective, the exact location, or the damage it caused.

That 2017 operation matters politically as well as militarily. The article says Trump set a precedent for using the MOAB through that Afghanistan strike. Now, prepared plans reportedly consider the weapon for military sites in Iran. However, the article does not say that another use has been approved or ordered.

06

Who has the authority to order the use of the MOAB, and what roles do the President and Pentagon play?

The article frames the President as the person who could order use of the MOAB. It says the weapon might hit Iranian military sites if ordered by President Trump. That wording identifies presidential direction as the decision point, while not claiming that such an order has been issued.

The Pentagon’s role is planning and execution. A department official said military planners prepare for a wide range of operational scenarios and work to execute presidential and secretary-level direction. In practice, that means the Pentagon develops options, organizes forces, and prepares to carry out an approved mission. The article does not identify a specific secretary or commander.

The distinction between authority and preparation remains central. The White House and Pentagon have reportedly prepared plans, but planning alone is not an attack order. Trump also said the United States would not attack Iran before the midterm elections, and the article reports no later change to that statement.

07

What physical destruction and pressure effects would a MOAB cause, and how are those effects different from a nuclear weapon?

A large air-blast bomb would be expected to produce a severe pressure wave, heat, and structural damage near the detonation. The blast could collapse vulnerable structures, damage equipment, and injure or kill people exposed to the expanding pressure. These are general effects of a major conventional explosion; the article does not estimate the MOAB’s specific damage in Iran.

Its main mechanism is rapid energy release in the air. The expanding gases push outward, creating a shock wave that can travel across open ground and strike buildings or cave entrances. Terrain, construction, distance, and the target’s protection would affect the result. The source does not state the bomb’s exact blast radius or physical destruction.

The important difference is that the MOAB is described as non-nuclear. A nuclear weapon involves nuclear reactions and can produce additional effects associated with nuclear detonations. The article gives no detailed comparison, so it is safest to say only that the MOAB is a very large conventional weapon, not a nuclear one.

This brief was written by AI from the original reporting and checked by other models. Names, figures and quotes come from the source; read it for full context.

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