'Mother of all bombs': US potential Iran strike plans include largest non-nuclear weapon - report

The GBU-43/B Massive Ordnance Air Blast Bomb is a very large conventional weapon developed by the United States military. It is commonly called the “mother of all bombs,” or MOAB. The article identifies it as the largest non-nuclear weapon in the US arsenal. That makes its possible use against Iran especially significant.

The weapon is designed to create a powerful blast across a wide area. A source familiar with planning described it as useful for “huge area clearance” and for producing psychological effects. Those features distinguish it from a specialized weapon designed to bore deep underground. Its nickname therefore reflects its scale and dramatic blast effect.

The reported plans considered using the MOAB against Iranian energy infrastructure and nuclear sites. However, officials questioned whether it could meet the larger goal of affecting deeply buried facilities. The weapon could signal resolve and cause widespread surface damage, yet still fail to destroy the most protected targets.

The article provides no exact measurement for the MOAB’s weight, length, or explosive yield. It does give a clear comparison: the GBU-43/B is the largest non-nuclear weapon in the US arsenal. That description places it at the top of the United States’ conventional bomb inventory, even though the source does not compare it numerically with other bombs.

The key difference is the type of explosion. The MOAB is a conventional weapon. A nuclear weapon releases energy through a nuclear reaction, while the MOAB produces a massive blast without being nuclear. The article calls its likely tactical value area clearance and psychological pressure, rather than deep penetration.

That distinction matters in the reported Iran scenario. The MOAB could create extensive surface effects, but sources said it would probably not reach deeply buried nuclear facilities. Its exceptional size would therefore not automatically make it suitable for the strategic mission being considered.

The reported US plans included attacks on Iranian energy infrastructure and nuclear facilities. Pickaxe Mountain was specifically named as one possible nuclear target. The plans therefore covered both systems that support Iran’s energy capacity and sites associated with its nuclear activities. Their inclusion would make any strike broader than an attack on a single military location.

Energy infrastructure can be an important part of a country’s national capacity, while nuclear facilities are central to concerns about Iran’s nuclear program. The article links the reported planning to the White House position that President Trump wants to ensure Iran can never have a nuclear weapon. That stated objective gives the nuclear sites particular importance.

The plans’ effectiveness remained uncertain. Several sources said the MOAB might not penetrate deeply enough to reach facilities such as Pickaxe Mountain. A strike could therefore damage infrastructure or create psychological pressure without achieving the stated objective of ending Iran’s ability to pursue a nuclear weapon.

The MOAB could be ineffective against deeply buried nuclear facilities because its design prioritizes a huge blast over underground penetration. Several sources told CNN that the bomb would likely be unable to reach facilities such as Pickaxe Mountain, which are believed to lie deep below the ground. Its size alone does not guarantee access to protected underground spaces.

One source described the MOAB as an “information operation type weapon” suited to “huge area clearance.” The same source said it was not designed as a deep penetration warhead. Its main mechanism would be a powerful surface blast and a strong psychological signal, rather than drilling through layers of earth and rock to destroy a buried installation.

That creates a gap between tactical damage and strategic success. The bomb might destroy or disrupt surface areas and demonstrate US resolve. Yet if the nuclear facilities survived underground, the strike might fail to stop the activities Washington wants to prevent. Officials therefore questioned its effectiveness.

In the reported planning language, a US “retrograde in CENTCOM AOR” means American forces would withdraw from the US Central Command area of responsibility. The article says the phrasing suggested the strike could happen before the United States pulled its forces out of the region. In plain terms, the sequence would be attack first, then withdrawal.

This does not necessarily mean every US presence would vanish instantly. It describes the planned movement of forces from the relevant military area. The key mechanism is timing: a strike would occur before the retrograde, potentially allowing the United States to conduct the operation and then remove forces from the region.

The reported sequence would matter because it could shape both military risk and political signaling. A rapid withdrawal might reduce the exposure of US forces after an attack. However, the strike itself could still produce major consequences, especially because officials described MOAB use as a significant escalation and questioned whether it would achieve Washington’s objectives.

Using the MOAB could escalate the conflict because it would represent a dramatic expansion in the scale and symbolism of military action. The article calls it the largest non-nuclear weapon in the US arsenal. Even without destroying an underground facility, deploying such a weapon could communicate extreme pressure and create a powerful psychological effect on Iran.

The weapon’s mechanism in this situation would therefore extend beyond physical destruction. A source said the MOAB was well equipped for psychological effects and described it as useful for clearing huge areas. A large blast against energy infrastructure or near nuclear sites could damage surface areas, unsettle the public, and signal that Washington was prepared to take further action.

That signal could produce consequences without accomplishing the strategic goal. Sources warned that the bomb might not penetrate deeply enough to destroy facilities such as Pickaxe Mountain. The result could be a major escalation, followed by uncertainty about effectiveness and Iran’s response. Officials also remained unsure about the president’s next decision.

A tactical effect is what a weapon does directly and immediately. For the MOAB, that could mean clearing a large area, damaging surface infrastructure, or creating psychological pressure. These effects describe the weapon’s short-term performance. They do not by themselves show whether the broader military or political mission has succeeded.

The strategic objective is the result policymakers ultimately want. In this case, the White House said the aim was to ensure Iran could never have a nuclear weapon. If the MOAB damaged an area but failed to reach an underground nuclear facility, it could achieve a tactical effect while missing that strategic objective. The two levels can therefore point in different directions.

The article highlights this difference through Pickaxe Mountain. Sources said the MOAB was not designed for deep penetration, although it could be powerful across a wide area. Officials consequently questioned whether its dramatic blast would help Washington achieve its larger goal, despite its obvious immediate impact.