Is the US Preparing the 'Mother of All Bombs' for Iran? What We Know About the MOAB Strategy

In a dramatic escalation of geopolitical tensions, a report by CNN reveals that U.S. military planners have prepared contingency options that include deploying the GBU-43/B Massive Ordnance Air Blast (MOAB)—commonly referred to as the "Mother of All Bombs"—against Iranian energy infrastructure and strategic surface targets if combat operations resume.

While U.S. officials emphasize that no decision has been made to authorize such an attack, the inclusion of the weapon in military planning highlights Washington's willingness to signal overwhelming conventional force.

Understanding the GBU-43/B MOAB: Capabilities and Scale

Developed during the Iraq War era, the GBU-43/B MOAB is the largest non-nuclear satellite-guided bomb in the U.S. inventory:

• Total Weight: 21,600 pounds (approximately 9.8 metric tons).
• Warhead Capacity: Contains 18,700 pounds of high-explosive BLU-120/B thermobaric filling.
• Blast Dynamics: Unlike deep-penetration weapons, the MOAB is designed to detonate just above ground level, creating a high-pressure shockwave capable of destroying targets across an area equivalent to nine city blocks.

Strategic Limitations: Surface Targets vs. Deep Underground Bunkers

Military defense analysts note that while the MOAB produces devastating surface destruction and psychological intimidation, its tactical utility against heavily fortified Iranian assets is limited:

• Incompatible with Deep Nuclear Sites: Iran’s most critical nuclear installations, such as the Fordow complex beneath Pickaxe Mountain, are protected by granite and deep rock layers. The MOAB lacks the kinetic penetration capability required for such targets, which are typically assigned to the 30,000-pound GBU-57 Massive Ordnance Penetrator (MOP) bunker busters.
• Optimal Targets: Defense sources indicate the MOAB would instead be directed toward surface oil/energy terminals, air defense arrays, radar command nodes, or troop concentrations where wide-area blast impulse is most effective.

Geopolitical Implications

The leak of these tactical options underscores the fragile security environment surrounding the Strait of Hormuz and global energy supply routes. Security experts caution that deploying high-yield munitions against energy infrastructure risks triggering wider regional escalation and severe volatility in global commodity markets.