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U.S. officials say that strikes conducted on three key Iranian nuclear sites have devastated its nuclear program, but independent experts analyzing commercial satellite imagery say the nation’s long-running nuclear enterprise is far from destroyed.
“At the end of the day there are some really important things that haven’t been hit,” says Jeffrey Lewis, a professor at the Middlebury Institute of International Studies at Monterey, who tracks Iran’s nuclear facilities. “If this ends here, it’s a really incomplete strike.”
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In particular, Lewis says the strike doesn’t seem to have touched Iran’s stocks of highly enriched uranium.
“Today, it still has that material and we still don’t know where it is,” he says.
“I think you have to assume that significant amounts of this enriched uranium still exist, so this is not over by any means,” agrees David Albright, the president of the Institute for Science and International Security, which has closely tracked Iran’s nuclear program for years.
The independent assessments stand in stark contrast to congratulatory statements from the Trump administration in the wake of the strikes.
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The U.S. military carried out its attack against Iran’s nuclear program early on Sunday, local time. Code-named “Operation Midnight Hammer,” the mission involved seven B-2 Spirit bombers carrying massive 30,000-pound bunker-buster bombs known as Massive Ordnance Penetrators.
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It appears that a dozen of the bombs were used to strike Iran’s deeply buried enrichment site at Fordo. Two weapons were also used to strike an underground centrifuge facility at Iran’s main enrichment site in Natanz.
Concurrent with the bombings, a U.S. submarine launched more than two dozen cruise missiles. Those weapons hit buildings and tunnel entrances at a third nuclear site at Isfahan.
A satellite image shows damaged buildings at the Isfahan nuclear site. The site was struck by cruise missiles launched from a U.S. submarine. ©2025 Maxar Technologies hide caption
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©2025 Maxar Technologies
“Iran’s nuclear ambitions have been obliterated,” Secretary of Defense Pete Hegseth said during a Pentagon press conference on Sunday. “The operation President Trump planned was bold and it was brilliant.”
Both Lewis and Albright say that the strikes themselves may well have been effective, although it is difficult to say for sure. Satellite imagery shows six deep holes in the ground around Fordo and ashy debris over much of the site. Albright believes that bunker-busters were used to try and strike at the enrichment facility’s ventilation system, along with the main hall where uranium-enriching centrifuges were kept.
“I think the purpose of the attack was to take out centrifuges and infrastructure and they feel they accomplished that,” Albright says.
But as evidence that the strikes may have missed the uranium stocks, both Albright and Lewis point to commercial satellite imagery from the days before the strike. The images show trucks at two key sites — Isfahan and Fordo. The trucks appear to be sealing tunnels that serve as entrances to underground facilities used to store uranium, possibly in anticipation of an American attack.
An image supplied by the Middlebury Institute of International Studies at Monterey shows trucks at the entrance of the Fordo enrichment facility the day before a U.S. strike on the site. Experts believe Iran could have spirited away its supply of highly enriched uranium in advance of the attacks. Middlebury Institute of International Studies at Monterey/Airbus Space and Defense hide caption
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Middlebury Institute of International Studies at Monterey/Airbus Space and Defense
Both experts believe Iranians could have also moved their enriched uranium out of the sites in the run-up to the U.S. strikes.
“There were trucks seen in imagery apparently hauling stuff away,” Albright says. “One would assume that any enriched uranium stocks were hauled away.”
The International Atomic Energy Agency had assessed that Iran has more than 400 kilograms of 60% enriched uranium 235 — enough for around 10 bombs, according to independent experts. That 60% enriched uranium is carried in relatively small containers that could fit easily into cars, says Albright.
Although Albright believes the program has been substantially set back, he thinks it could still be reconstituted.
Albright says Iran may also have thousands of uranium-enriching centrifuges that were never installed in Natanz and Fordo. It might be possible to move the uranium to another, covert facility, where it could be enriched to the required 90% for a nuclear weapon in a relatively short period of time. Even then, Iran would have to take further steps to fashion the uranium into a weapon.
“The program has been seriously set back, but there’s a lot of odds and ends,” Albright says. Ultimately he thinks the only way to truly end Iran’s nuclear program is through additional nuclear inspections by international monitors and cooperation from the Iranian regime, probably through some kind of diplomatic agreement.
Lewis agrees: “Even the most brilliant bombing campaign, probably is not going to get us where we want to be,” he says.
