Israel and the United States have conducted extensive military strikes targeting Iran's nuclear weaponization infrastructure rather than enrichment facilities, according to analysis of satellite imagery by the Institute for Science and International Security. The strikes, part of Operation Roaring Lion and Operation Epic Fury, focused on facilities and infrastructure related to the weaponization of enriched uranium, including development sites and research institutions.
The targeting strategy reflects a deliberate choice by the two countries to prioritize degrading Iran's ability to weaponize nuclear material over striking enrichment capabilities. This approach follows a 12-day war one year ago in which enrichment facilities were already destroyed. The new strikes target the infrastructure necessary to convert enriched uranium into functional nuclear weapons components—a critical capability gap that extends the timeline for Iran to develop a complete nuclear arsenal.
Key Weaponization Sites
One major target was the Min Zadai site, which the Institute for Science and International Security said is suspected to have played a key role in Iran's attempts to recover nuclear weapons capabilities after the June 2025 strikes. On March 3, the IDF announced strikes on the complex, describing it as a partially underground "nuclear headquarters" where nuclear scientists were developing key components for nuclear weapons systems. Reporting by the French newspaper Le Monde suggested the Min Zadai complex was involved in the metallurgy of nuclear weapons cores.
Another heavily targeted facility was Taleghan 2, a highly fortified facility within Iran's Parchin military complex that has been used in Iran's nuclear weapons testing and development of advanced explosives. This site represents critical infrastructure for weaponization research that had remained operational despite previous military actions.
Universities and Research Infrastructure
Universities with connections to Iran's development of nuclear weapons were also targeted in the strikes. Tehran's Malek Ashtar University, which the IDF directly tied to nuclear weaponization, and an adjacent laboratory-type building connected to the university by a footbridge were heavily damaged in strikes. The university-adjacent laboratory was built right next to the Mojdeh site, a nuclear site destroyed by Israeli strikes in June 2025, suggesting a pattern of institutional research infrastructure dedicated to weapons development.
Imam Hussein University, a key Islamic Revolutionary Guard Corps university, was struck on March 10 for hosting an underground weapons research and development complex used by the IRGC for experimentation and testing related to ballistic missiles. The targeting of these educational institutions indicates that Iran's nuclear weapons program relies significantly on university-based research and development capabilities integrated with military structures.
Scope of Weaponization Targeting
In addition to at least four sites specifically tied to nuclear weaponization by the IDF, the Institute for Science and International Security analysis identified three other targeted sites likely to have also been used in the development of nuclear weapons. The institute said the destruction of key weaponization sites likely significantly increased the time it would take for Iran to complete the production of nuclear weapons.
The analysis of satellite imagery showed that little new damage was done to Iranian nuclear enrichment facilities already destroyed in strikes during the 12-day war one year ago. This distinction is significant: while enrichment—the process of increasing uranium purity—requires specialized centrifuge facilities that are difficult to replace, weaponization involves the scientific knowledge and specialized equipment needed to convert enriched uranium into a functional nuclear device. By targeting weaponization infrastructure and the institutions housing that expertise, the strikes aim to create a longer timeline for Iranian nuclear weapons development even if enrichment capabilities are eventually restored.
Why This Matters:
The strategic focus on weaponization rather than enrichment reflects a recognition that nuclear weapons development involves multiple technical and institutional barriers, not merely the production of enriched uranium. By targeting universities, military research complexes, and specialized facilities, the strikes aim to disrupt the human expertise and institutional knowledge necessary for weapons development—a more difficult capability to rebuild than centrifuge facilities. This approach raises questions about the long-term sustainability of any military strategy against nuclear proliferation, particularly regarding whether destruction of facilities and institutions can permanently constrain a state's weapons ambitions, or whether it merely delays development timelines. The involvement of educational institutions in weapons research also highlights how nuclear programs become embedded in civilian infrastructure, creating complex tradeoffs between military objectives and broader institutional impacts. International oversight mechanisms and diplomatic frameworks for nuclear non-proliferation face ongoing challenges when military action becomes the primary tool for addressing proliferation concerns.