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The Number That No Longer Has an Address

440.9 kilograms

Some crises begin with an explosion. This one begins with an absence. As of June 13, 2025, the International Atomic Energy Agency estimated that Iran possessed 440.9 kilograms of uranium in the form of hexafluoride enriched to 60%. Since the strikes on Iran’s nuclear facilities, the agency has been unable to determine the current quantity, exact composition, or location of the material.

This number is not a weapon. Nor does it prove that a decision to build a bomb has been made. The public record from the U.S. Congressional Research Service even notes that in 2025, U.S. intelligence assessed that Iran was not building a nuclear weapon. But material so close to the military threshold, removed from ongoing verification, becomes more than just an industrial inventory.

It becomes a cloud of doubt heavy enough to mobilize armies, tighten sanctions, and make every statement more dangerous.

The Gap Between Knowing and Believing

On June 8, 2026, Rafael Grossi called on Tehran to resume cooperation with the IAEA. He was not asking for a symbolic gesture. He was calling for the restoration of a process: declarations, access, inventories, seals, measurements, and then the ability to compare what is reported with what is observed.

Without this chain, governments replace knowledge with their own assessments. The most cautious speak of uncertainty. The most impatient speak of a threat. The most bellicose are already treating the hypothesis as a verdict. The void, therefore, is never empty for long: it fills with calculations, suspicions, and strike plans.

The nuclear vertigo stems not only from what we know. It stems from what no one can prove anymore.

Une inspection n’est pas une faveur
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An inspection is not a favor

The Treaty Remains in Force

The safeguards agreement concluded under the Treaty on the Non-Proliferation of Nuclear Weapons remains in force. The IAEA report of February 27, 2026, emphasizes a simple legal point: Iran cannot unilaterally suspend it. The attacks on its facilities have disrupted the material conditions for inspection; they have not eliminated the obligations of declaration and access.

Tehran, however, has a genuine grievance. The IAEA Director General reiterated that nuclear facilities dedicated to peaceful purposes should never be attacked, given the risks to people, the environment, and safety and security. Acknowledging this wrongdoing does not require accepting the end of verification. Two truths can coexist in the same sentence without contradicting each other.

Bombing a nuclear facility is dangerous; preventing its subsequent verification is also dangerous—in a different way, more slowly, but more profoundly.

Sovereignty and Evidence

Iran asserts that its program is civilian. This assertion deserves to be heard, but it cannot verify itself. The safeguards regime exists precisely because no state should be required to take another state at its word when fissile materials are at stake.

Inspection does not take away sovereignty. It transforms a national assertion into a verifiable assurance. When this mechanism breaks down, sovereignty does not necessarily gain ground; it becomes trapped within a narrative that neighbors, allies, and adversaries can no longer distinguish from a ploy.

International trust is not a compliment. It is an architecture of evidence.

Les frappes ont détruit plus que du béton
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The strikes destroyed more than just concrete

Seven facilities containing nuclear material

The IAEA estimates that seven declared facilities containing nuclear material were hit during the June 2025 attacks: Fordow, the two enrichment facilities at Natanz, and several conversion and fabrication units in Isfahan. The research reactor at Khondab, still under construction and containing no nuclear material, was also struck.

The war thus targeted capabilities. It also disrupted the continuity of knowledge that made it possible to monitor these capabilities. At the start of the attacks, the Agency suspended its verification activities; by the end of June, it had withdrawn its inspectors for security reasons. An absent camera does not create a centrifuge. But it removes the ability to demonstrate what a centrifuge does—or does not do.

One can destroy a hall, a tunnel, or a cascade; one also destroys the verifiable record of what was there.

The Trap of “Obliteration”

A strike can damage infrastructure while leaving the material it contained intact. This is precisely the disconnect that haunts this case. Uranium is not a factory. A facility can be rendered inoperable while a stockpile remains recoverable, movable, or simply inaccessible beneath the rubble.

Triumphal rhetoric then becomes a vulnerability. Claiming that everything has been obliterated does not pinpoint a single gram. It may even delay the essential question: What has survived, in what form, under whose control, and with what possibility of verification?

Concrete can be pulverized. Uncertainty, however, withstands bombs very well.

Le seuil de 60 % et ses faux raccourcis
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The 60% Threshold and Its False Shortcuts

Close is not the same as identical

Uranium intended for power reactors generally contains less than 5% uranium-235. Weapons-grade uranium is around 90%. Iran’s stockpile, estimated at 440.9 kilograms, was enriched up to 60 percent—an extraordinarily high level for a program presented as civilian and technically much closer to 90 percent than a simple arithmetic subtraction would suggest.

However, this does not mean that Iran possesses ten bombs. Further enriching the material is only part of the process. Manufacturing a device also requires a viable design, a detonation system, and mastery of metallic uranium. The Congressional report clearly distinguishes between the time to achieve a fissile breakthrough and the time to achieve weaponization.

Confusing material, breakthrough, and weapon creates a dramatic certainty where the report raises three distinct questions.

Fear Without Exaggeration

Caution does not diminish the danger. It makes it more precise. The IAEA characterizes the prolonged loss of access to highly and low-enriched uranium as a proliferation concern. Its standard detection timeframe for the diversion of a significant quantity of highly enriched uranium is one month; here, the disruption has extended well beyond that.

Genuine concern therefore rejects two fallbacks: the convenient denial that 60% means nothing, and the alarmism that immediately transforms a stockpile into an arsenal. Between the two lies the more demanding territory of verification.

Nuclear truth is rarely reassuring. Above all, it is less dangerous than a slogan.

Le rapport que Téhéran n’a pas remis
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The report that Tehran failed to submit

A Very Concrete Obligation

Following the attacks, Iran was required to inform the Agency of the status of the affected facilities and the associated nuclear materials. As of February 27, 2026, no report, no declaration, and no access had made it possible to verify these sites. The IAEA could therefore not confirm that the declared materials remained in peaceful use.

This seemingly administrative shortcoming lies at the political heart of the crisis. Nuclear accounting is not a chart for diplomats. It allows one to link a quantity to a chemical form, a facility, a movement, or an inventory. When a link disappears, the material may still exist, but its trajectory ceases to be public and verifiable.

The missing document has become more significant than the one that was submitted, because it encompasses all possible trajectories that no one can rule out.

Absence as an Event

International politics is often recounted through visible decisions: a resolution, a strike, a summit. Here, the decisive event is what did not happen. No complete report. No access to the struck facilities. No independent verification of the stockpile.

This absence does not prove a diversion. The Board of Governors’ resolution states it more rigorously: the Agency is unable to verify that none occurred. This distinction is crucial. It prevents the accusation from becoming a lie, without turning the unknown into certainty.

What cannot be ruled out always ends up factoring into military plans.

La résolution du 10 juin
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The June 10 resolution

Twenty-one votes in favor

Two days after Grossi’s appeal, the Board of Governors adopted a resolution by a vote of 21 to 3, with 10 abstentions. It demands that Iran provide complete information on its nuclear material inventories and the design of its facilities, as well as all necessary access to verify them.

The vote shows genuine support, but not unanimity. This is important. In an institution where the Iranian issue cuts across rivalries among major powers, abstentions and opposition votes signal that even the demand for verification is becoming a geopolitical battleground. The norm remains; its political authority is fracturing.

When the accounting of a nuclear stockpile becomes a bloc vote, technical expertise ceases to be a common refuge.

The Door to the Security Council

Suffering an injustice does not grant the right to obfuscate.

L’Iran a une blessure; le monde a une question
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Iran has a wound; the world has a question

Facilities should not be targets

Law and strategic prudence converge here. Striking a nuclear facility creates risks that go beyond the immediate military objective. The IAEA has made this point unequivocally. The potential consequences affect people, the environment, safety, security, and regional peace.

Iran can therefore denounce the attacks without such denunciation being a diversion. The United States and Israel have chosen to use force against sites subject to safeguards. This fact undermines the credibility of those who subsequently invoke the international order to demand access. The West cannot turn a blind eye.

One cannot sustainably defend a rule by striking the very place where it is supposed to be applied, and then blaming the rubble for hiding the evidence.

But the damage remains

The accountability for the strikes still does not pinpoint the estimated 440.9 kilograms. It does not indicate whether the stockpile is intact, scattered, buried, moved, or partially destroyed. It does not allow the IAEA to resume the measurements upon which international assurance depends.

Tehran links access to the recognition of its rights and, more recently, to a final agreement with Washington as well as to concrete measures to lift sanctions. This leverage is understandable in a negotiation. It remains perilous, however, because every week without verification increases the strategic value of the doubt itself.

Suffering explains a position. It never replaces an answer.

Le canal cassé
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The Broken Channel

Grossi’s Words Fall on Deaf Ears

On June 8, Rafael Grossi summed up the situation with a blunt statement: the communication channel is broken. Even when bombings make inspections impossible, he said, there are many other things that can be done. Technical exchanges, notifications, preparations for access, provisional accounting: dialogue is not the same as an inspection, but it can prevent the process from dying.

Yet this breakdown turns every public message into a negotiation conducted through microphones. Washington announces a commitment. Tehran denies it. The IAEA affirms that inspections will take place. An Iranian deputy minister responds that no access to the attacked sites is planned until a final agreement is reached and steps are taken regarding sanctions.

The world hears three timelines, three political truths, and still no entry date for the inspectors.

The Diplomacy of Modalities

On June 24, Grossi was still talking about dates, procedures, and locations yet to be determined. This detail shows that the proclaimed principle does not equate to actual access. An inspection exists only when an inspector can go to the right place, at the right time, with the necessary instruments and authorizations.

The verbal conflict is therefore not trivial. It reveals that the parties do not even yet share an operational definition of their commitment. The interim agreement may open a door; no one has demonstrated that it leads to Fordow, Natanz, Isfahan, and the materials declared there.

In nuclear matters, “soon” is not a date. It is a debt.

La vérification avait déjà rétréci
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Verification had already been scaled back

The Slow Dismantling Since 2018

The current crisis did not begin with the strikes. In 2018, the United States withdrew from the Joint Comprehensive Plan of Action (JCPOA). Beginning in 2019, Iran exceeded several limits set by the agreement. In February 2021, it ceased to authorize all verification and monitoring activities provided for under the JCPOA.

Since then, the IAEA has been operating within a narrower scope, based on the General Safeguards Agreement. The 2025 strikes did not shatter an intact system; they struck an architecture already weakened by years of reciprocal decisions, sanctions, violations, and mistrust.

We let the window shrink year after year, then feigned surprise when the room went dark.

Responsibility is not symmetrical

Saying this does not amount to assigning equal shares of blame. Iran is accountable for its safeguards obligations, its violations, and its denial of access. The United States is accountable for its withdrawal from an agreement that imposed physical limits and enhanced monitoring. Those who carried out the strikes are accountable for the consequences of attacking nuclear facilities.

Clarity of responsibility is better than lazy symmetry. Each side made a distinct choice. Together, these choices have produced a system in which everyone is now demanding assurances that their own decisions have helped to make more difficult.

Mistrust did not come out of nowhere. It was built, decision by decision.

Ce que les services de renseignement ne remplacent pas
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What Intelligence Agencies Cannot Replace

Seeing Without Verifying

Satellites can observe activity around a tunnel. Intelligence agencies can track convoys, intercept communications, and assess damage. The IAEA itself uses commercial satellite imagery when it does not have access to the sites. These tools matter. They do not provide the same assurance as a physically verified inventory.

Intelligence seeks to determine an adversary’s intent and capability. Safeguards seek to ensure the accounting continuity of declared materials. The former often operates in secrecy and accepts probabilistic uncertainty. The latter builds a shareable international foundation. Confusing the two is tantamount to asking every capital to trust the other’s assessment.

A satellite can see a door open; it cannot weigh the contents of a cylinder behind a mountain.

The War of Assessments

When inspections disappear, national assessments become diplomatic weapons. A pessimistic estimate justifies urgency. An optimistic estimate justifies waiting. Classified evidence cannot always be debated, and past errors poison present trust.

That is why the IAEA, despite its limitations and the criticism it faces, remains irreplaceable. Not because it knows everything, but because it offers a common method for reducing what each side claims to know on its own.

Without a technical arbiter, every capital becomes the judge of its own fear.

Le prix régional du doute
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The Regional Price of Doubt

A Threat on the Move

Uncertainty does not remain confined to the tunnels of Isfahan. It seeps into Israel’s military doctrines, the calculations of the Gulf monarchies, U.S. decisions, debates over sanctions, and Tehran’s strategy. It increases the likelihood that each party will act before having the full picture.

The most immediate danger is not necessarily an assembled bomb. It could be a strike launched because a government believes it is running out of time. It could be a retaliatory strike against a facility, a regional escalation, or a misreading that turns into a military campaign.

The lack of verification shortens the political timeline precisely at the moment when the nuclear issue demands a slowdown.

The People Left in the Dark

The consequences fall on populations who will never see a safeguards report. Iranians endure the strikes, the sanctions, and the radiological risk. Neighbors live with the possibility of escalation. Soldiers and their families become the variables in a calculation fueled by incomplete information.

It would be indecent to invent their fears or their actions. The fact alone is enough: the less shared knowledge there is, the higher the cost of a mistake becomes for millions of people who have no control over inventories, negotiations, or targeting plans.

Uncertainty is abstract in a report. It becomes concrete when a country decides to strike.

Ce qu’un accord sérieux doit contenir
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What a Serious Agreement Must Include

Not just a promise

A useful agreement must specify sites, materials, deadlines, and procedures. It must allow the IAEA to verify inventories, restore continuity of knowledge, and assess what has been damaged, moved, or rendered inaccessible. It must also ensure the safety of inspectors in an environment marked by strikes.

General statements are no longer enough. The memorandum discussed in June can, in principle, oversee nuclear activities; the dispute centers specifically on its practical implementation. Fordow, Natanz, Isfahan. Access to the attacked sites. Access to materials. Timeline. Sampling and measurement procedures.

Nuclear peace depends less on the rhetoric of a press release than on the list of doors that are actually opened.

A Possible Sequence

The first step should be the submission of a complete inventory and its comparison with the latest verified data. This would be followed by priority access to the locations where the 60% enriched uranium was stored, and then the gradual reestablishment of monitoring at the enrichment and conversion facilities.

At the same time, the parties should address sanctions and site security without making the truth a final reward. Verification must begin during the negotiations, because it is what allows the negotiations to continue. Waiting for the perfect agreement before verifying is tantamount to asking doubt to guarantee the process.

Verification does not come after trust is established. Verification is done so that trust can begin.

La vérité qui dérange chaque camp
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The truth that unsettles both sides

What Iran Must Accept

Tehran cannot ask the world to distinguish its civilian program from a military trajectory while refusing the tools that make that distinction credible. Its assertion of peaceful intent does not constitute proof. Its obligation to provide safeguards does not disappear under sanctions or bombs.

It must account for declared materials, allow necessary access, and resolve outstanding issues regarding undeclared materials and activities. This does not imply a decision to build a weapon. It affirms a more modest and solid rule: nuclear material subject to safeguards must be verifiable.

Iran has a right to its security and to civilian technology; it does not have a right to trust without inspection.

What the West Must Acknowledge

Washington and its allies cannot turn every gap into military certainty. Available public assessments do not demonstrate that Iran has decided to build a weapon. They must also account for the U.S. withdrawal from the JCPOA and the strikes that exacerbated the breakdown in monitoring.

If they want to restore the IAEA’s authority, they must uphold its rules even when they limit their own freedom of action. The international order cannot be a padlock for the adversary and a doorknob for oneself.

A rule that binds only the other side is no longer a rule.

440,9 kilogrammes, encore
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440.9 kilograms, again

The Number and Its Limits

The figure keeps coming up because it is the last firm point before the fog. 440.9 kilograms of uranium enriched to 60%, estimated as of June 13, 2025. The IAEA had verified 432.9 kilograms of this amount. After that, the continuity was broken.

This number does not describe the present. It marks the last known shore. It should neither be inflated into an existing arsenal nor reduced to an outdated statistic. As long as the current inventory has not been established, it remains the measure of what the international community has lost: not just a quantity, but the ability to track its fate.

The key figure in this crisis is not that of a single bomb. It is that of shattered trust.

The only victory that matters

Another strike could delay a program. Another resolution could further isolate Iran. An agreement could offer a respite. None of these things will replace the moment when inspectors gain access to the materials and can report what they have measured.

Victory will not be a declaration of surrender. It will be almost mundane: a consistent inventory, secure access, functioning instruments, a report that adversaries agree to read as a common ground.

In this crisis, the spectacular has already failed so often. What remains is to try the verifiable.

Rendre le temps au monde
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Giving Time Back to the World

Moving Away from the Military Clock

Verification does not resolve all conflicts. It does not make leaders benevolent, does not lift sanctions, does not repair facilities, and does not guarantee that no clandestine activity exists. It does, however, buy time: time to observe, to challenge with facts, to negotiate before striking.

This time is the scarcest commodity in the Iranian dossier. Every contradictory statement consumes it. Every month without access increases the risk that a national assessment will take the place of an international one. Every threat pushes the other side to further protect precisely what we would like to see.

Reopening the sites to the IAEA means giving governments a few hours of reason before the minutes of war.

The question that remains

The world still does not know exactly where the entire stockpile is located, what condition it is in, or what political decision accompanies it. It does, however, know what is needed to reduce this ignorance. The obligations exist. The inspectors exist. The procedures exist. What is missing is access.

So the choice becomes clearer. Continue to harbor doubt until it triggers another strike. Or accept that the strongest sovereignty is the one that can show, measure, and respond without flinching in the face of evidence.

440.9 kilograms. And how much longer before the lack of a response decides for us?

Signed, Maxime Marquette, columnist

Columnist’s Transparency Box

Editorial Stance

I am not a journalist, but a columnist and analyst. My expertise lies in observing and analyzing the geopolitical, economic, and strategic dynamics that shape our world. My work consists of dissecting political strategies, understanding global economic trends, contextualizing the decisions of international actors, and offering analytical perspectives on the transformations that are redefining our societies.

I do not claim the cold objectivity of traditional journalism, which is limited to factual reporting. I strive for analytical clarity, rigorous interpretation, and a deep understanding of the complex issues that affect us all. My role is to make sense of the facts, place them within their historical and strategic context, and offer a critical analysis of events.

Methodology and Sources

This text respects the fundamental distinction between verified facts and interpretive analyses. The methodological rule is consistent: factual information is published only if it is supported by a verifiable source, and the sources actually used in this article are listed under “Sources,” never here.

Categories of primary sources used by the publication, when applicable: official press releases from governments and international institutions, public statements by political leaders, reports from intergovernmental organizations, and dispatches from recognized international news agencies.

Types of secondary sources: specialized publications, internationally recognized news media, analyses from established research institutions, and reports from sector-specific organizations.

When an article cites statistical, economic, or geopolitical data, it comes from data-producing institutions (intergovernmental organizations, central banks, national statistical institutes), and the specific institution is named under “Sources.”

Nature of the Analysis

The analyses, interpretations, and perspectives presented in the analytical sections of this article constitute a critical and contextual synthesis based on available information, observed trends, and expert commentary cited in the sources consulted.

My role is to interpret these facts, contextualize them within the framework of contemporary geopolitical and economic dynamics, and give them coherent meaning within the broader narrative of the transformations shaping our era. These analyses reflect expertise developed through continuous observation of international affairs and an understanding of the strategic mechanisms that drive global actors.

This article describes a situation documented as of its publication date, not a prediction: subsequent developments may alter these perspectives. No updates are promised in advance; when an article is corrected or supplemented, the change is dated within the text.

ANALYSIS: The IAEA’s Failure to Act Turns Iranian Uranium into a Crisis of Trust

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