Asaf Rozentzweig (N12) reports that US officials say Iran's new Supreme Leader, Mojtaba Khamenei, views a simple fission bomb as less useful and instead supports developing an advanced thermonuclear warhead that could be miniaturized for a long-range missile. The officials add that Iranian hardliners who argued only a nuclear weapon can deter Israel or the US now feel the war has validated their position.
According to a report by Asaf Rozentzweig (N12), US officials assess that Iran's new Supreme Leader, Mojtaba Khamenei, has shifted away from considering a relatively simple fission bomb — similar to the Hiroshima bomb — and instead supports development of an advanced thermonuclear warhead that could be miniaturized for a long-range missile. The officials say this change in approach reflects the new leader's calculus, and that Iranian hardliners who insisted only a nuclear weapon can deter an Israeli or American attack now feel the war has validated their position.
The report comes shortly after a New York Times report, covered by The Zioneer earlier this evening, which said US intelligence agencies assessed that Mojtaba Khamenei is more open to developing nuclear weapons than his father and seeks advanced capability, though the intelligence was collected before he assumed the role of Supreme Leader. The new N12 report provides additional on-the-record sourcing from US officials.
Previous reports, including from Bloomberg in early June, noted that Western officials assess the risk of Iran secretly advancing nuclear weapons is higher now than before the US and Israeli strikes in June 2025, citing Iran's large stockpile of near-weapons-grade uranium and the absence of international inspections. An expert report in July, cited by The Jerusalem Post, said Iran believes nuclear weapons are essential for regime survival after repeated strikes.
The new assessment suggests that the shift in Iran's nuclear posture is not merely a matter of capability but of leadership intent, with the new Supreme Leader actively backing a more sophisticated weapons program. The claims remain based on a single report from N12 citing unnamed US officials, without independent corroboration.
3 developments
- StrongUnverified reports: Iran's Supreme Leader Mojtaba Khamenei appeared at father's funeral events
- DevelopingReport: Debate in Iran's top leadership escalates, each camp seeks to pull Mojtaba Khamenei to its side
- DevelopingKhamenei Jr. tells Fars News: nuclear talks contradict our ideology, won't prevent attack on Iran's infrastructure
- StrongIranian economic activist claims Mojtaba Khamenei will attend father's funeral
Source and signal
- Open-source intake