In the latest episode of Photo Evidence, host Catherine Barnwell examines years of satellite imagery showing Iran’s Taleghan 2 military facility, a site suspected of being linked to the Islamic Republic’s nuclear weapons programme.
Taleghan 2 is located within the sprawling Parchin military complex, about 20 miles southeast of Tehran. The site has been targeted in repeated bombing raids since 2024.
The facility was constructed in the early 2000s as part of the notorious Amad Plan, Iran’s covert effort to develop a nuclear warhead. Tehran has consistently denied that the programme ever existed.
Under the 2015 nuclear agreement negotiated during Barack Obama’s presidency, Iran committed to prohibiting this type of weapons research. That deal has since unravelled, while satellite images captured from 2024 onward have revealed a series of unusual developments at Taleghan 2.
Israel destroyed the building in October 2024. Iran subsequently rebuilt it and covered the new bunker with concrete and earth, but Israel struck the site again in March 2026.
Barnwell charts the facility’s latest reconstruction and considers what Iran may be concealing inside the heavily protected site.
In Photo Evidence, Catherine Barnwell examines years of satellite imagery of Iran’s Taleghan 2, a facility suspected of being linked to the Islamic Republic’s nuclear weapons programme
Taleghan 2 lies within the sprawling Parchin military complex, about 20 miles southeast of Tehran. The complex has been repeatedly bombed since 2024
Barnwell traces the facility’s latest reconstruction and examines what the Islamic Republic could be hiding inside
‘Satellite imagery showed Iran beginning repair work at the site,’ she explained.
‘Iran then erected a huge tarpaulin canopy over the entire damaged underground structure, blocking aerial and satellite views of the work taking place below.
‘The apparent purpose was to conceal activity underneath, including the possible movement of new testing equipment into the facility.
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‘One of the central questions is whether Iran is replacing the high-explosive containment vessel believed to have been destroyed during the March strikes.
‘When Israel’s Mossad seized Iran’s secret nuclear archive in 2018, the documents and photographs included material directly linked to Taleghan 2 in 2003.
‘Among the most important pieces of equipment shown in the archive was a small cylindrical steel vessel installed inside Taleghan 2 to contain high-explosive experiments.
‘The vessel was used in what are known as cold tests. During these experiments, scientists use conventional explosives to compress uranium substitutes, enabling them to study the mechanics of a nuclear implosion without producing a nuclear explosion.
‘It is considered the essential final stage in designing a functional nuclear warhead.’
Barnwell’s findings raise fresh concerns about Iran’s current nuclear ambitions while also suggesting that the country pursued weapons-related research despite its commitments to the contrary.
The same archive indicated that Iran had not genuinely dismantled its programme, but that its leaders had ordered the work to be divided and concealed in 2003.
‘The files showed that Taleghan 2 was never completely abandoned after 2003, and that experiments involving nuclear explosives continued under increased secrecy throughout the 2000s and 2010s,’ Barnwell explained.
‘Most importantly, the archive revealed that Iran’s leadership ordered the programme to be split up rather than destroyed in mid-2003.
‘Sensitive research was quietly transferred to a covert track, with scientists dispersed among universities and front organisations. That allowed dual-use information generated at locations such as Taleghan to continue advancing under the cover of academic work.
‘In the months before 2024, however, intelligence declassifications indicated that Iran had brought this expertise back into use, quietly returning to the undeclared Taleghan 2 facility to restart highly secretive explosive research.’
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