US considering using ‘mother of all bombs’ against Iran, sources say, raising regional concerns.

The United States is reportedly considering the potential use of the GBU-43/B Massive Ordnance Air Blast (MOAB), often called the "mother of all bombs," against Iran, according to recent reports from multiple news outlets. This consideration is part of new military strike plans developed should President Donald Trump authorize renewed combat operations. Potential targets include Iranian energy infrastructure and nuclear facilities, such as the suspected underground site at "Pickaxe Mountain".

The GBU-43/B MOAB is the largest non-nuclear bomb in the US arsenal, weighing over 21,000 pounds and designed to create a massive blast across a wide area. While its deployment would mark a significant escalation in the ongoing conflict, which began with US and Israeli strikes in February 2026, some officials have expressed doubts about its effectiveness against deeply fortified underground targets. Its potential use is also being considered for its psychological impact, rather than solely for deep penetration capabilities.

The White House has declined to comment directly on specific military plans, but a spokesperson stated that President Trump maintains "all options on the table" to ensure Iran never obtains a nuclear weapon. The Pentagon indicated that it routinely prepares a range of operational scenarios. This development comes amid continued hostilities and diplomatic impasses between the two nations, with President Trump having previously suggested he faces a major decision regarding the conflict.