https://www.frontpagemag.com/fpm/2022/04/iran-plays-hide-and-seek-iaea-hugh-fitzgerald/
The International Atomic Energy Agency (IAEA) is the body responsible for monitoring and inspecting Iran’s nuclear program. Iran has in the past has kept hidden from the IAEA certain sites, of whose existence the agency became aware only after the Mossad managed to locate and bring to the West in 2018 Iran’s entire nuclear archive, which provided the evidence of those top-secret well-hidden sites. But even where the IAEA knew of the existence of sites where Iran’s nuclear program was proceeding, its inspection teams were in some cases required to give Iran a long lead time of warning before going to a particular site, which allowed Iran to remove any incriminating evidence of activities it was not permitted to engage in, including the enrichment of uranium to a level of 60%, just below weapons grade. And Iran continues to keep certain sites off-limits to the IAEA inspectors altogether, like the facilities built deep inside the mountain at Fordow, or underground at Natanz.
This past December, after months of wrangling, the IAEA was at long last allowed to inspect the site at Karaj, where Iran had a workshop that made centrifuge parts. It seemed like a clear victory for the IAEA, but it was short-lived. For now Iran has moved all of its machines out of Karaj to its site at Natanz (it’s not clear if it is an aboveground, or underground, facility). In addition, Iran has set up a another site in Isfahan, where it will also produce parts for advanced centrifuges. A report on these sites, and Iran’s managing to play hide-and-seek with the IAEA, is here: “Iran moves equipment for making centrifuge parts to Natanz – IAEA,” Reuters, April 6, 2022:
Iran has moved all its machines that make centrifuge parts from its mothballed workshop at Karaj to its sprawling Natanz site just six weeks after it set up another site at Isfahan to make the same parts, the UN nuclear watchdog said on Wednesday.