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Institute for Science and International Security
Washington non-profit; open-source satellite analysis of nuclear weapons programmes worldwide since 1993.
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#152 10 Jul
Mentioned in: Grossi won't back Iran's Bushehr claim
Iran Conflict 2026#140 26 Jun
Estimated 265-287kg of HEU at Esfahan's backfilled tunnels from satellite imagery
Iran Conflict 2026: 461 kg of uranium no one can verify#136 23 Jun
Estimated 155-175 kg of Iran's 440.9 kg HEU remains unlocated since 28 February
Iran Conflict 2026: Iran takes oil, refuses the inspectors#137 23 Jun
Mentioned in: IRGC media: opacity is the deterrent
Iran Conflict 2026#132 18 Jun
Mentioned in: Deal demands access Khamenei calls excessive
Iran Conflict 2026#128 14 Jun
Mentioned in: The nuclear core is left for later
Iran Conflict 2026#120 5 Jun
Mentioned in: Treasury hits first Chinese oil firm
Iran Conflict 2026#101 17 May
Mentioned in: Drone hits perimeter of Barakah nuclear plant
Iran Conflict 2026#71 16 Apr
Rosatom walks 180 staff out of Bushehr
Iran Conflict 2026#74 6 Apr
Fordow inoperable since June 2025 bunker-busters
Iran Conflict 2026#74 6 Apr
#44 19 Mar
IDF bombs nuclear campus in Tehran
Iran Conflict 2026#41 17 Mar