What Does Washington Want From Iran’s Nuclear Program?
US demands that Iran end its nuclear capabilities sound absolute, but negotiations appear focused on enrichment capacity, stockpiles, inspections and breakout risk.
Washington says Iran must commit to ending development of its nuclear capabilities. Taken literally, that could mean dismantling everything from uranium enrichment to medical isotopes and power generation. In practice, US officials appear focused on the parts of the program that shorten Iran’s path to a weapon.
Vice President JD Vance told Reuters that Iran must make meaningful reductions in enrichment capacity. He questioned why a country claiming peaceful aims needs uranium enriched to 60%, a level far above the roughly 3% to 5% used in most civilian power reactors and a relatively short technical step from weapons-grade material.
Before the latest strikes, the International Atomic Energy Agency estimated that Iran possessed 440.9 kilograms of uranium enriched up to 60%. Under the agency’s standard conversion measure, that was enough material for several weapons if further enriched, although possessing material is not the same as having a tested bomb design, delivery system or political decision to build one.
Airstrikes damaged or destroyed known facilities, but uncertainty increased afterward. The IAEA believes substantial enriched material may have survived in tunnel complexes. Inspectors have not regained full access to bombed sites, and the location and condition of some centrifuges and uranium stocks remain unclear.
That leaves four practical negotiating questions. First, what happens to the 60% stockpile? Options include shipping it abroad, destroying it or downblending it to a lower concentration. Second, how much enrichment can continue, at what level and using which centrifuges? Third, how are hidden equipment and damaged sites inventoried? Fourth, what inspection powers will the IAEA receive?
The phrase “end nuclear capabilities” can obscure these specifics. Iran has a nuclear power plant at Bushehr and civilian research activities. Eliminating every nuclear capability would be far broader than preventing a weapon. US officials may use maximal language for leverage, but any enforceable agreement must define machines, materials, sites and timelines.
Iran says it will never build nuclear weapons and has cited religious and strategic reasons. The IAEA previously said it had no credible indication of a current coordinated weapons program. At the same time, Iran’s 60% enrichment, reduced monitoring and unresolved safeguards questions created a capability that alarmed inspectors and governments.
Verification matters more than declarations. A promise never to make a bomb is difficult to enforce if inspectors cannot account for uranium or reach relevant sites. Conversely, demanding public surrender without sanctions relief gives Tehran little political reason to accept intrusive monitoring.
The 2015 nuclear agreement offers a technical template: caps on enrichment level and stockpile size, restrictions on centrifuges, detailed accounting and enhanced inspections. President Trump withdrew the United States from that agreement in 2018, and Iran later expanded its program well beyond the deal’s limits. Any new accord must address the distrust produced by both steps.
There is also a legal distinction. The Nuclear Non-Proliferation Treaty recognizes a right to peaceful nuclear energy under safeguards. It does not explicitly grant an unlimited right to any enrichment level or stockpile. Iran interprets Article IV as protecting domestic enrichment; the United States has at times demanded zero enrichment. That disagreement cannot be solved by slogans.
An achievable deal would likely lengthen the time Iran needs to produce weapons-grade material, make diversion detectable and tie sanctions relief to verified steps. It cannot erase scientific knowledge. Even complete dismantlement of current facilities would leave Iranian engineers capable of rebuilding eventually.
The true policy choice is therefore between managed, inspected capacity and attempts to destroy capacity repeatedly by force. Military action can delay equipment. A durable ceiling requires political consent and monitoring.
Missile development is sometimes folded into the same discussion, although a missile can carry conventional weapons and nuclear agreements have historically treated delivery systems separately. Washington may seek limits on both, but calling every missile a nuclear capability widens the negotiation dramatically. Clarity about whether the talks cover fissile material, weapon design or delivery systems is essential.
Any agreement also needs a dispute mechanism. Inspectors will encounter ambiguous sites, delayed access and technical disagreements. Without a process for resolving those disputes before sanctions snap back or bombs fall, even a detailed accord can collapse during its first serious test.
What to watch next
Watch whether Washington defines “ending capabilities” as zero enrichment or a major reduction, whether Iran accepts downblending, and whether the IAEA regains access. The details—not the toughest public phrase—will reveal whether diplomacy has a workable target.