This report is an update to an October 7, 2020 report on Iran’s construction of a new centrifuge assembly facility in the mountains near the Natanz enrichment plant. Newly obtained high resolution commercial satellite imagery shows:

• Continued work at what we had identified in the October 7th report as a former gunnery range being converted into a construction staging area: additional clearance; addition of permanent structures to the previously identified construction sheds; and additional construction equipment;
• These recent changes indicate the staging area could be a future location of support buildings for the reported future underground centrifuge assembly center, such as administration and security support facilities;

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Read the full report at the Institute for Science and International Security.