IRAN’S NUKES What Damage Did the U.S. Do to Iran’s Nuclear Program? Why It’s So Hard to Know
Disagreements over the damage the U.S. bombing did to Iran’s nuclear facilities are unsurprising. Battle damage assessment –originally called bomb damage assessment –is notoriously difficult, and past wars have featured intense controversies among military and intelligence professionals.
The U.S. Air Force dropped a dozen ground-penetrating bombs, each weighing 30,000 pounds (13,607 kilograms), in a raid on Iran’s nuclear site at Fordo on June 21, 2025. The attack was an attempt to reach the uranium enrichment facility buried deep inside a mountain. The target, President Donald Trump declared, was “completely and totally obliterated.”
Others were less sure. On June 24, the administration canceled a classified intelligence briefing to members of Congress, leading to frustration among those with questions about White House claims. While Defense Intelligence Agency analysts apparently agree that the strikes did real damage, they dispute the idea that the attack permanently destroyed Iran’s enrichment capability. Reports emerged that their initial analysis found that the strikes had only set Iran back a few months.
Such disagreements are unsurprising. Battle damage assessment – originally called bomb damage assessment – is notoriously difficult, and past wars have featured intense controversies among military and intelligence professionals. In World War II, poor weather and the limits of available technology conspired against accuracy.
Battle damage assessment remained a thorny problem decades later, even after radical improvements in surveillance technology. In the first Gulf War in 1990, for example, military leaders argued with CIA officials over the effects of airstrikes against Iraq’s armored forces.
I am a scholar of international relations who studies intelligence and strategy in international conflicts, and the author of “Fixing the Facts: National Security and the Politics of Intelligence.” I know from history that overcoming the challenges of battle damage assessment is especially hard when the target is a facility hidden under hundreds of feet of earth and rock, as is the case at Fordo.
Tools of the Trade
The intelligence community has a number of tools and techniques that can help with challenges like assessing the damage at Fordo. Imagery intelligence such as satellite photography is the obvious starting point. Before-and-after comparisons might reveal collapsed tunnels or topographical changes, suggesting unseen subterranean damage.
More exotic data collection techniques may be able to help infer the underground effects based on particle and electromagnetic emissions from the site. These platforms provide what is called measurement and signatures intelligence. Specialized sensors can measure nuclear radiation, seismographic information and other potentially revealing information from camouflaged facilities. When combined with traditional imagery, measurement and signatures intelligence can provide a more detailed model of the likely effects of the bombing.
