In a revelation that directly contradicts President Donald Trump's repeated claims of military success, US intelligence agencies have concluded that the time Iran would need to build a nuclear weapon has remained unchanged since last summer, according to three sources familiar with the matter. The assessment, which has been quietly circulating among senior officials, indicates that Iran retains both the material and expertise to produce a weapon within approximately nine months to a year, exactly the same window that existed after the June 2025 Operation Midnight Hammer. This means that more than two months of additional US-Israeli bombardment, which has killed thousands of civilians and assassinated senior Iranian scientific personnel, has failed to move the needle a single day on what Washington claims is its primary casus belli.
The intelligence picture is remarkably consistent, and remarkably embarrassing for Washington. According to two sources familiar with pre-war assessments, US intelligence agencies had concluded before Operation Midnight Hammer in June 2025 that Iran could likely produce enough bomb-grade uranium for a weapon and build a bomb within approximately three to six months. Following the US strikes that June, which targeted the Natanz, Fordow and Isfahan nuclear complexes and were conducted in coordination with Israeli and American intelligence estimates pushed that timeline back to about nine months to a year. Now, after an additional two months of war that began on February 28, including Israel's March strike on a uranium-processing facility and the ongoing US campaign of air strikes and assassinations, the timeline remains frozen at that same estimate.
As Eric Brewer, a former senior US intelligence analyst who led assessments of Iran's nuclear program, told Reuters, it was "not surprising that the assessments have not changed" because recent US strikes have not prioritised nuclear-related targets.
The International Atomic Energy Agency estimates that when Israel launched its first attacks in June 2025, Iran had 440.9 kilograms of uranium enriched to 60 percent, according to a report by The National, an English-language daily based in Abu Dhabi. If enriched further, that stockpile would provide enough explosive material for ten nuclear weapons, according to an IAEA yardstick cited by bdnews24.com. While inspections have been halted because Iran has formally suspended its cooperation with the IAEA since June a decision driven by Tehran's accusation that the agency effectively facilitated Israeli strikes on Iranian nuclear sites, the whereabouts of this material remain largely known.
IAEA chief Rafael Grossi confirmed in March 2026 that the agency estimates the 440.9 kilograms of 60 percent enriched uranium was kept at nuclear plants nationwide, with most of it likely stored in an underground tunnel complex at the Isfahan Nuclear Research Centre. This material is probably located in deeply buried underground sites where US munitions cannot penetrate. The US may have destroyed centrifuges and damaged buildings, but the bomb-grade material remains intact and beyond the reach of American bunker-busters.
The Trump administration's other major line of effort, the assassination of Iranian nuclear scientists, has also failed to deliver the promised strategic dividend. Israeli Prime Minister Benjamin Netanyahu has publicly confirmed that Israeli airstrikes eliminated a leading Iranian nuclear scientist during the ongoing conflict, explicitly citing the goal of "dismantling Iran's nuclear program". Since 2010, Israel has eliminated nearly two dozen Iranian nuclear scientists in targeted killings. Yet as David Albright, a former UN nuclear inspector who runs the Institute for Science and International Security, told Reuters, the impact on Iran's basic capacity is far from certain: "I think everyone agrees knowledge can't be bombed, but know-how certainly can be destroyed."
The loss of senior personnel is a genuine blow, but Iran's nuclear establishment, like its military command structure has repeatedly demonstrated a remarkable ability to adapt, train new personnel, and continue its work. Knowledge and experience are distributed across the scientific community, and the systematic assassination of individuals cannot extinguish an institutional commitment that has survived for more than two decades under intense international pressure.
Even Israel's own military assessments suggest a more complex reality than Washington's triumphalist narrative. Israeli officials have claimed that the strikes on Iranian nuclear facilities, including a March attack on a uranium-processing facility, have set back the program. Yet the unchanging US intelligence timeline suggests that whatever damage was inflicted was either repaired, compensated for, or simply not as extensive as claimed. As Brewer observed, the unchanging estimate reflects "the focus of the latest US and Israeli military campaign" which, rather than targeting nuclear facilities, has concentrated on civilian infrastructure, the assassination of Iranian leadership, and the destruction of conventional military assets.
As the sun sets on two months of conflict, the intelligence community's assessment stands as an uncomfortable truth for a White House that has staked its credibility on military victory. The timeline to an Iranian nuclear weapon has not moved, the material remains safe, and the knowledge endures.