Lead
US officials have reportedly discussed deploying special forces into Iran to secure a 440kg stockpile of highly enriched uranium (HEU), which experts say could be refined into at least 10 nuclear warheads. The consideration comes amid broader US and Israeli operations launched after 28 February; senior US figures, including Secretary of State Marco Rubio, have told lawmakers that boots-on-the-ground options are being discussed. International monitors and technical specialists warn the sites holding HEU are fortified and deeply buried, making any extraction complex and risky. The administration says such an operation would only be contemplated once Iranian defensive capabilities were severely degraded.
Key takeaways
- The contested HEU stockpile totals about 440kg, enough for an estimated minimum of 10 nuclear weapons if converted to weapons-grade material.
- IAEA director Rafael Grossi reported roughly 200kg is stored in deep tunnels at the Isfahan complex; additional quantities are at Natanz in a fortified, deeply buried facility analysts call “Pickaxe Mountain.”
- US and Israeli special-operations units have trained for nuclear-material recovery and the US has equipment (the Mobile Uranium Facility) to contain and transport HEU.
- Extracting canisters—each reportedly about the size of a scuba tank—would require major ground operations in Iran’s interior, with extensive logistical and security challenges.
- President Trump acknowledged the difficulty and said troops would not be sent until Iranian defenses were sufficiently degraded; he did not rule out a later operation.
- Critics in Congress say there was no clear plan to secure Iran’s HEU before military action began; some analysts urge negotiated post-conflict options like dilution or export.
- Experts stress that further enrichment and weaponization would still be detectable and dangerous, making the period of attempted breakout the highest-risk window.
Background
The United States has identified preventing Iran from obtaining a nuclear weapon as a central objective of its recent military policy. Iran’s declared stockpile of highly enriched uranium has drawn particular attention because HEU can be converted to weapons-grade material faster than starting from lower-enriched forms. Historically, operations to secure nuclear materials from hostile settings have been technically demanding and politically fraught, requiring coordination across intelligence, special operations, and diplomatic channels.
Since the strike campaign that escalated on 28 February, US and Israeli militaries have reportedly discussed contingency plans for recovering sensitive materials. The International Atomic Energy Agency (IAEA) continues to monitor declared facilities, but inspectors have limited access in active conflict zones. Negotiations brokered by third parties—previously cited as ongoing before the strikes—had sought to address Iranian nuclear inventories through technical arrangements such as removal or dilution, but those talks were interrupted by the recent military actions.
Main event
Senior US officials briefed Congress in recent days on discussions about potential special-operations missions to retrieve HEU from Iranian facilities. Secretary of State Marco Rubio told lawmakers that “people are going to have to go and get it,” signaling that clandestine or overt recovery operations are under consideration. US and Israeli planning reportedly ranges from joint raids by special forces to use of specialised containment equipment already fielded for HEU handling.
Rafael Grossi of the IAEA has said that about 200kg of the HEU inventory sits in deep tunnels near Isfahan, with additional material at Natanz in a newly constructed, fortified underground complex Western analysts describe as Pickaxe Mountain. The HEU is reportedly stored as uranium hexafluoride in metal canisters roughly the size of scuba tanks, placed down deep shafts and within hardened enclosures, complicating access and removal.
Experts familiar with recovery operations note that moving such material would require heavy lift and protective assets, a secure perimeter and specialised containment gear like the Mobile Uranium Facility. Jeffrey Lewis, a proliferation specialist, stressed the scale of the logistics—airlift, cranes and secure staging—or alternatively the risks of destructive options that could spread contamination and escalate the conflict. President Trump told reporters a ground retrieval would only occur when Iranian defenses were so degraded they could not resist such an operation.
Analysis & implications
Operationally, seizing HEU from deep, fortified sites is fraught with technical, tactical and diplomatic hazards. Any ground operation would risk heavy casualties, collateral damage and further entanglement in Iran’s interior, complicating post-conflict stabilization. Even a successful physical removal would raise questions about secure transport and custody of weapons-usable material in contested regions.
Politically, the apparent absence of a fully developed extraction plan before hostilities drew criticism from lawmakers and non-proliferation experts. Democratic Representative Bill Foster said he heard no clear plan during a classified briefing, arguing that the HEU should have been a primary focus of contingency planning. Analysts such as Matthew Bunn have argued that negotiated solutions—dilution, export under international custody or a postwar agreement—are technically safer but require Iranian cooperation that may be unobtainable amid conflict.
Strategically, the prospect of Iran attempting a rapid breakout—further enrichment, metallurgy and weapon assembly—remains a major concern. Former US envoy Robert Malley noted that the interval from decision to weaponization is the point of greatest danger because detection is likely and detection invites attack. Consequently, monitoring and interdiction remain central to any mid- and long-term strategy, even if extraction is not immediately feasible.
Comparison & data
| Location | Reported HEU (kg) | Potential warheads (approx.) |
|---|---|---|
| Isfahan (deep tunnels) | ~200 kg | ~4–5 |
| Natanz (Pickaxe Mountain) | remainder of 440 kg total | ~5–6 |
| Total reported stockpile | 440 kg | 10+ |
The table simplifies complex technical processes: converting HEU to weapon cores requires chemical processing, metallization and precision engineering—steps that increase detectability and time. For planners, the raw kilogram totals are a starting point; practical weaponization and deployment timelines depend on facilities, skilled personnel and access to testing and delivery systems. Monitoring and interdiction reduce the plausibility of a secret, rapid breakout.
Reactions & quotes
Lawmakers and analysts reacted sharply to reports that contingency planning for securing HEU was incomplete when hostilities began. After a classified briefing, Representative Bill Foster stated his expectation that the HEU issue should have been central to operational planning and said he had seen no clear plan.
“Iran’s stockpile of highly enriched uranium should be the administration’s primary focus. That is clearly not the case,”
Rep. Bill Foster (Democrat, congressional briefing)
Technical experts emphasise the practical difficulties of extraction from fortified underground sites and warn against simplistic expectations of quick recovery missions.
“It is pretty well defended and large and bulky, so you’re not going to just go in and pick it up,”
Jeffrey Lewis, Middlebury Institute proliferation expert
Diplomats and former officials underline that a combination of monitoring, negotiation and long-term safeguards could mitigate the danger more safely than hazardous field operations.
“The period from decision to acquisition is the zone of maximum danger—if you’re detected, you’re likely to be bombed,”
Robert Malley, former US special envoy to Iran
Unconfirmed
- Precise distribution of the full 440kg between Isfahan, Natanz and other sites has not been independently verified in public documents.
- Specific operational plans, timelines or troop deployments for a US or joint US-Israeli extraction mission have not been confirmed by official spokespeople.
- Details about the exact defensive posture and troop strengths at the reported HEU sites remain unclear and subject to change during hostilities.
Bottom line
The reported consideration of special-forces missions to seize Iran’s HEU underscores the acute strategic dilemma: securing weapons-usable material is urgent but extremely difficult, especially when inventories are buried in fortified subterranean facilities. Physical extraction carries high operational risk, political cost and logistical hurdles; negotiated technical solutions would be safer but require cooperation unlikely during active conflict.
For policymakers, the immediate priorities are clear: sustain international monitoring where possible, press for technical safeguards in any diplomatic track, and prepare contingency plans that weigh operational feasibility against escalation risks. For the public and lawmakers, the episode highlights the need for detailed contingency planning for nuclear materials before kinetic action is taken.
Sources
- The Guardian (media report)
- International Atomic Energy Agency (IAEA) (official statements/monitoring)