IRAN: What the Bombs Leave Behind

by Michael Hollister
Published at apolut media on March 19, 2026

3.752 words * 20 minutes readingtime

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The Invisible Legacy of the Iran War

A military operation designed to stop Iran’s nuclear program may have triggered the very strategic dynamic it was meant to prevent. Weeks after the first strikes, the International Atomic Energy Agency is reporting radioactive releases at four Iranian nuclear facilities, stating it has no access to the bombed sites – and admitting that the whereabouts of roughly 440 lbs (200 kg) of uranium enriched to 60 percent cannot be verified. The material is gone. Nobody knows where it is.

That is not the story being told. The headlines report military successes, destroyed centrifuges, a weakened enemy. What they don’t report: that the same operation designed to stop Iran’s nuclear program may have triggered the very strategic dynamic it claimed to prevent. That in the rubble of Isfahan and Natanz lie not only destroyed facilities, but a question nobody can answer – one that could become the defining issue of the coming decades.

Anyone who wants to understand the long-term consequences of this war must analyze three layers simultaneously: what physically happened inside the facilities and what that means for people and the environment; what happened to the nuclear material and what that means strategically; and which political forces in Iran are now moving to the foreground, now that the person widely regarded as the institutional brake against nuclear weapons is no longer alive.

The answers to these three questions together paint a picture that directly contradicts the official narrative.

What the Bombs Actually Hit

To understand what happened in the weeks following February 28, 2026, you need to know what these facilities actually were – and what they contained.

Isfahan was – or is – Iran’s central site for uranium conversion. This is where natural uranium is processed into uranium hexafluoride (UF₆), the gaseous feedstock for the enrichment process. UF₆ is a white solid at room temperature, but under pressure and heat it becomes a gas that is pumped through the centrifuge cascades at enrichment plants. According to the IAEA, Isfahan contained several building complexes with nuclear material at the time of the strikes: a centrifuge workshop, a uranium storage facility, a nuclear fuel production plant, a laboratory with nuclear material, a facility for uranium pellet production, and a building for handling contaminated equipment.

What happens when one of these structures is destroyed by a bomb strike, pressure wave, or structural collapse is well understood. UF₆ reacts immediately with atmospheric moisture – in an explosion, a fire, or simply from the rupture of pressurized containers, the gas escapes into the surrounding air and within seconds splits into two compounds simultaneously: uranyl hydroxide and hydrogen fluoride, better known as hydrofluoric acid.

Hydrofluoric acid is one of the most dangerous compounds in industrial chemistry – and simultaneously one of the least known outside specialist circles. Sulfuric acid causes immediate, visible tissue destruction. Hydrofluoric acid penetrates through the skin without causing pain at first. The fluoride ion migrates into tissue, binds calcium and magnesium, disrupts cell membrane function, and causes systemic hypocalcemia – a dramatic drop in blood calcium levels that can trigger cardiac arrhythmia and cardiac arrest. Exposure to as little as three percent of the body’s surface area can be fatal without immediate treatment. Workers in Isfahan who were exposed to this gas – whether by inhalation or skin contact – are either dead or will die of organ failure in the coming years. Iran does not publish medical records. International observers have no access.

That is the acute dimension. The chronic dimension is no less serious. When uranium hexafluoride comes into contact with moisture, it does not only produce hydrofluoric acid – it also produces uranyl hydroxide, a radioactive particle that settles, can be inhaled, and accumulates in lungs, kidneys, and bones. The radiobiological consequences of this exposure do not manifest immediately, but over decades: elevated rates of lung cancer, kidney failure, and leukemia.

Natanz, Iran’s main uranium enrichment site, was attacked with earth-penetrating munitions. The IAEA confirmed two impact craters above the underground enrichment halls used for enrichment and storage. “Based on our knowledge of the contents of these halls, we estimate that this attack could have caused localized contamination and chemical hazards,” IAEA Director General Rafael Grossi stated before the Board of Governors on March 2, 2026. At Fordow, the second enrichment site, craters are visible that confirm the use of earth-penetrating munitions. Grossi told the Board of Governors explicitly: “At this point, no one – including the IAEA – is in a position to fully assess the underground damage at Fordow.”

The IAEA’s official finding: no elevated radiation levels in neighboring states. What it cannot say: what happened inside the facilities themselves, what happened to the people working there, and what happened to the nuclear material.

The Missing Material

Here lies the real strategic problem of this military operation – and it is more serious than anything being publicly discussed.

Before the first strikes in June 2025, Iran held a stockpile of 971 lbs (440.9 kg) of uranium enriched to 60 percent, according to IAEA verification. This figure is documented in the IAEA report from September 2025. Sixty percent is far above the level for civilian reactor use – which sits at 3 to 5 percent – and is only one technical step below weapons grade, which begins at 90 percent. Iran is the only non-nuclear-weapon state in the world enriching at this level.

The strategic significance of 60-percent enriched uranium has been precisely described by the American non-governmental organization Center for Arms Control and Non-Proliferation: enrichment to 60 percent already accomplishes more than 90 percent of the separative work required to bring natural uranium to weapons grade. A single cascade of 175 modern IR-6 centrifuges could produce the weapons-grade end product for a nuclear warhead from the existing 60-percent material in approximately 25 days. With multiple cascades, proportionally faster. Under IAEA definitions, highly enriched uranium hexafluoride – the material spinning through the centrifuges at Natanz and Fordow – is classified as “Direct Use Material”: it can be converted into finished uranium metal components for nuclear weapons within one to three weeks.

Now comes the real problem. The IAEA estimates that approximately 440 lbs (200 kg) of this material may still be present underground at Isfahan. But that is an estimate – not a verification. In its September 2025 report, the IAEA uses strikingly direct language: “The Agency has lost the continuity of knowledge of the current stocks of nuclear material in Iran, including low and highly enriched uranium, which needs to be urgently remedied.” That sentence appears in an official IAEA Board of Governors document. It means: the global authority responsible for nuclear oversight does not know where a significant portion of Iran’s nuclear material is.

For the missing material, there are three scenarios of varying severity.

The first: it lies buried under rubble. The bomb strikes destroyed facilities, the material is entombed, slowly contaminating the surrounding area and seeping into groundwater aquifers over decades. A serious environmental and health problem – but not an immediate weapons problem.

The second scenario is strategically the most sensitive: the material was evacuated before or between the strikes. Eight days elapsed between Israel’s first strikes on Iranian nuclear facilities in June 2025 and the U.S. attack on Fordow. The Institute for Science and International Security (ISIS), a Washington-based NGO with longstanding Iran expertise, notes in its September 2025 analysis that the IAEA has been unable to monitor centrifuge production in Iran since 2021 – since Iran had all JCPOA-related monitoring equipment removed in June 2022. The direct consequence: the IAEA does not know how many centrifuges Iran has produced in total, how many were installed, and how many are stored at unknown locations. According to ISIS, it is plausible that Iran had already stored one or more cascades of IR-6 centrifuges at undisclosed locations prior to the war. If true, the destruction of known facilities is not an endpoint but a setback – one that is surmountable once the remaining enriched material and the stored reserve centrifuges are brought together.

The third scenario combines both: some destroyed, some contaminated, some secured. And nobody can verify these proportions today. This is not speculation – it is the documented state of knowledge of the IAEA itself.

One additional detail that has received almost no coverage: ISIS documented, shortly before the war began, that Iran had announced to the IAEA a planned new facility called the “Isfahan Fuel Enrichment Plant” – without disclosing a location or details. ISIS estimates this facility was located in a tunnel complex at the main Isfahan site that had been partially built before centrifuges were installed. U.S. strikes destroyed three tunnel entrances. Satellite imagery shows that Iran has since regained access to at least one entrance. Whether this facility can be made operational again is unknown.

The fundamental paradox of this military operation can be summarized in one sentence: it did not prevent Iran from possessing nuclear material. It merely damaged the known production sites. The material that would be relevant for weapons purposes continues to exist – its location is either unknown or buried in the ground. That is not the same as “the program is finished.”

The Long Contamination

Separate from the strategic debate over nuclear material, there is a second time horizon almost entirely absent from public reporting: the long-term consequences for people and the environment in the affected regions.

The comparison that comes up most often lies in Europe. During the NATO bombing of Yugoslavia in 1999, U.S. and NATO forces deployed over 31,000 rounds containing depleted uranium at 112 sites in Kosovo, Serbia, and Montenegro – an estimated eleven tons in total. Depleted uranium is both radioactive and chemically toxic. It has a biological half-life of approximately 5,000 days in the human body, accumulates in bones, kidneys, and lungs, and can cause cancers there decades after the original exposure. Primary target organs include kidneys, lungs, and bone marrow – raising rates of lung, kidney, and blood cancers. A 2009 European Parliament written question (H-0101/2009) documented that 45 Italian soldiers stationed in Kosovo had died of cancer in the years following the deployment, with another 515 personnel of various nationalities falling seriously ill – the so-called “Balkan Syndrome.”

Whether a direct causal link between depleted uranium and these illnesses exists remains scientifically contested. A study published in PLOS ONE analyzed hematological cancer rates in Kosovo over 20 years and found an increase in hematological malignancies following the war – without being able to attribute it definitively to depleted uranium. A 2017 meta-analysis in ScienceDirect summarizes the state of research: no confirmed proof of direct causation, but elevated depleted uranium levels in soils of affected regions, and an explicit recommendation for “long-term monitoring over centuries” by the International Coalition to Ban Uranium Weapons. That caveat matters – and it is even more relevant for Iran than for the Balkans.

Because the difference between what was released in Kosovo in 1999 and what happened in Iran in 2025 and 2026 is not one of degree, but of kind. In Kosovo, munition residue from depleted uranium was released: low concentration, distributed across hundreds of impact points, primarily in soils and field margins. In Iran, facilities were bombed that contained enriched uranium and uranium hexafluoride in industrial quantities: concentrated release at a small number of known sites, with additional chemical toxicity from hydrofluoric acid, in or near populated areas and critical water infrastructure.

Isfahan, where the uranium conversion facility was located and UF₆ was present in substantial quantities, sits on the Zayandeh River – the most significant river in central Iran, supplying the Isfahan region with approximately two million people. The river feeds irrigation systems that are indispensable for the region’s agriculture and runs through one of the historically most densely settled regions of the country. Contamination of the river water could not be contained locally.

Natanz is located on the central Iranian plateau at roughly 5,250 feet (1,600 m) elevation, in an arid region with no surface water. What this region does have is fossil groundwater aquifers – water reserves that have accumulated over millennia and are now extracted via deep wells as the sole drinking water source for agricultural communities. Radioactive particles that penetrate the soil are not filtered by these aquifers. They accumulate. The timeframe in which they affect drinking water quality depends on soil composition and precipitation – in arid plateau regions, hydrologists speak in terms of decades, sometimes centuries.

Fordow is located in the mountains near Qom, a pilgrimage city of nearly one million residents. The underground facility was struck with bunker-busting bombs, leaving craters at the surface that are visible in satellite imagery. What was released in the underground enrichment halls lies, with current knowledge, literally in the dark.

Who will conduct this monitoring? The IAEA has no access. The World Health Organization has no presence in the affected regions. Iran will not publish data that would undermine the narrative of successful resistance. The populations around Isfahan, Natanz, and Qom are living in an information vacuum that will manifest over the next ten to twenty years in rising cancer rates, kidney disease, and unexplained deaths – without any official causal link to the source ever being established. That is not speculation. It is the historically documented pattern of every case in which radioactive or nuclear-toxic substances were released in populated areas without subsequent monitoring – from the nuclear test sites in Kazakhstan to the contaminated regions after Chernobyl, to the legacy illnesses in Iraq following the use of depleted uranium munitions in the Second Gulf War.

The North Korea Pattern and the Khamenei Question

In the strategic analysis of the Iran war, one question is almost never asked – even though it is the most important: what is the rational conclusion for an Iranian leader to draw from what has happened over the past months?

To answer that question, a brief historical look at three cases is necessary – cases that every head of state in the world knows.

Muammar Gaddafi ruled Libya until 2003 with an active nuclear weapons program. Under international pressure, he disarmed, declared his program, allowed international inspectors into the country, and cooperated with the West. In 2011, he was overthrown in a NATO-backed uprising and killed while fleeing.

Saddam Hussein no longer had an active nuclear weapons program by the 1990s. IAEA inspectors had verified this; UN inspections confirmed the absence of weapons of mass destruction. In 2003, U.S. forces invaded Iraq. Saddam Hussein was executed in 2006.

Kim Jong-un has led North Korea for over a decade. The country possesses nuclear weapons – an estimated 40 to 50 warheads, along with intercontinental ballistic missiles. The United States has not attacked North Korea.

These three cases are not coincidental. They describe a coherent pattern discussed in strategic analysis as the “Libya Model” or “Proliferation Security Dilemma”: states that renounce nuclear weapons or never acquire them risk violent regime change. States that possess nuclear weapons are left alone. The logic is brutally simple – and it is not irrational.

Whether Iranian leaders share this logic is not speculation but documented debate. Even before the war, Iranian politicians and military figures had publicly invoked the North Korea example. Since February 28, 2026, that debate is no longer abstract.

Here a personnel dimension comes into play that has so far received almost no analysis.

Ali Khamenei, Iran’s Supreme Leader since 1989, had issued multiple fatwas against nuclear weapons over decades. Islam forbids weapons of mass destruction that by definition kill civilians, went the religious reasoning. These fatwas were not merely PR rhetoric for Western diplomats – they carried institutional weight in a political system in which the Supreme Leader’s religious directives are binding. The IAEA confirmed over the years that Iran was operating at the edge of what was permissible, but was not building a nuclear weapon. The religious doctrine was a real factor.

Ali Khamenei is dead. He was killed in the strikes – along with his wife, a younger daughter, and other family members. His son Mojtaba Khamenei is regarded as a potential successor and as a hardliner. What he thinks politically is difficult to assess from the outside – he operated in the background for decades. What he has experienced is documented: he lost his father, his mother, his sister. The men who ordered it sit in Washington and Tel Aviv. This is not an analysis of emotions – but anyone who wants to understand which strategic logic now dominates in Tehran cannot sidestep this fact.

The analytical question here is not a moral one. It does not ask whether Iranian nuclear weapons would be good or bad. It asks: if the person who functioned as the religious and institutional brake against nuclear weapons within the Iranian system was eliminated – which forces now move to the foreground? Which strategic logic dominates in Tehran, when you know the North Korea pattern, when you have just watched four nuclear facilities be bombed, and when the religious doctrine that stood against nuclear weapons has died with its author?

It is striking that this question almost never surfaces in Western reporting. The operation was celebrated as a success: centrifuges destroyed, program set back. What goes unexamined is the possibility that the operation did not weaken the strategic calculus in Tehran – but shifted it. Away from “we don’t need a nuclear weapon” and toward “we need one now more than ever.”

That would not be the product of Iranian irrationality. It would be the product of rational conclusions drawn from observable facts.

What Remains

There is a question that raises the Clausewitzian bedrock logic of war: what was the political objective this military operation was meant to serve?

If the objective was to destroy Iran’s capability to enrich uranium to weapons grade – the result is ambiguous. Centrifuge facilities are damaged. The enriched material is partly of unknown location. Enrichment capacity has been set back, but not eliminated; the IAEA assesses that Iran possesses the knowledge to produce more centrifuges.

If the objective was to permanently steer Iran away from the path to a nuclear weapon – then strategic analysis points in the opposite direction.

For decades, one argument was made in the debate over Iran’s nuclear program that was rarely heard: that Iran had not built the nuclear weapon even though it was theoretically capable of doing so. That the decision not to build was based on a combination of religious doctrine, strategic calculation, and international pressure. That this decision is subject to change if conditions change.

The conditions have changed.

The Iranian population is experiencing a war imposed from outside. Four nuclear facilities lie in ruins. Radioactive and toxic substances have been released into areas where people live. The religious leader who had religiously prohibited nuclear weapons is dead. The North Korea example – the only country in a comparable strategic position that is not being attacked – is more present than ever.

Whether Iran will actually build a nuclear weapon, nobody knows. What can be analyzed is the direction in which the strategic logic points. And that direction was not weakened by the war – it was reinforced by it.

That is the invisible legacy of this operation: not found in rubble, not in radiation logs, not in military situation reports. But in the conclusions being drawn by people in Tehran when they look at the history of the past two decades – and then at the past few weeks.

This analysis is made available for free – but high-quality research takes time, money, energy, and focus. If you’d like to support this work, you can do so here:

Alternatively, support my work with a Substack subscription – from as little as 5 USD/month or 40 USD/year!
Let’s build a counter-public together.

Michael Hollister is a geopolitical analyst and investigative journalist. He served six years in the German military, including peacekeeping deployments in the Balkans (SFOR, KFOR), followed by 14 years in IT security management. His analysis draws on primary sources to examine European militarization, Western intervention policy, and shifting power dynamics across Asia. A particular focus of his work lies in Southeast Asia, where he investigates strategic dependencies, spheres of influence, and security architectures. Hollister combines operational insider perspective with uncompromising systemic critique—beyond opinion journalism. His work appears on his bilingual website (German/English) www.michael-hollister.com, at Substack at https://michaelhollister.substack.com and in investigative outlets across the German-speaking world and the Anglosphere.

Sources

IAEA – Primary Documents

1. IAEA Director General’s Introductory Statement to the Special Session of the Board of Governors, March 2, 2026 – iaea.org
2. IAEA Director General’s Introductory Statement to the Board of Governors, March 2–6, 2026 – iaea.org
3. IAEA Update on Developments in Iran (5) – iaea.org
4. IAEA Update on Developments in Iran (6) – iaea.org
5. IAEA Board Report GOV/2026/8: NPT Safeguards Agreement with the Islamic Republic of Iran, February 27, 2026 – iaea.org
6. IAEA Board Report GOV/2025/50: Verification and Monitoring in the Islamic Republic of Iran, September 3, 2025 – iaea.org
7. IAEA Chronology of Key Events – Iran – iaea.org

Independent Analysis and News Sources

8. Arms Control Association: The U.S. War on Iran – New and Lingering Nuclear Risks, March 2026 – armscontrol.org
9. Center for Arms Control and Non-Proliferation: Iran’s Stockpile of Highly Enriched Uranium – Worth Bargaining For?, March 2026 – armscontrolcenter.org
10. Institute for Science and International Security (ISIS): Comprehensive Updated Assessment of Iranian Nuclear Sites Five Months After the 12-Day War, September 2025 – isis-online.org
11. Institute for Science and International Security (ISIS): Analysis of IAEA Iran Verification and Monitoring and NPT Safeguards Reports, September 2025 – isis-online.org
12. Al Jazeera: IAEA confirms buildings damaged at Iran’s Natanz nuclear facility, March 3, 2026 – aljazeera.com
13. Iran International: IAEA says no damage at Iran nuclear sites, envoy says Natanz was hit, March 2, 2026 – iranintl.com
14. UN News: Iran-Israel crisis – IAEA chief calls for access to damaged nuclear sites, June 2025 – news.un.org
15. World Nuclear Association: Nuclear Power in Iran (background) – world-nuclear.org
16. NucNet: IAEA Reports No Radiation Increase After Strikes in Iran, March 2, 2026 – nucnet.org

Health and Environment – Comparative Literature

17. PLOS ONE: Incidence of haematological malignancies in Kosovo – A post “uranium war” concern, 2020 – plosone.org
18. European Parliament, Written Question H-0101/2009: Elevated cancer incidence from the use of depleted uranium ammunition in Kosovo – europarl.europa.eu

© Michael Hollister – All rights reserved. Redistribution, publication or reuse of this text requires express written permission from the author. For licensing inquiries, please contact the author via www.michael-hollister.com.

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