Iran's Nuclear Sites Struck — Natanz, Fordow Under Attack as Breakout Timeline Collapses

Iran March 5, 2026 3 min read

Striking Iran's Nuclear Infrastructure

The coalition's primary strategic objective — degrading Iran's nuclear breakout capability — has resulted in strikes on 6 of 8 known Iranian nuclear facilities. The campaign represents the most significant military action against a nation's nuclear program since Israel's 1981 strike on Iraq's Osirak reactor.

Facility-by-Facility Assessment

The Enriched Uranium Question

Before the strikes, Iran had accumulated approximately 440.9 kg of uranium enriched to 60% — well above the 90% weapons-grade threshold but requiring only minimal additional enrichment. The critical question is whether this stockpile was dispersed to unknown locations before strikes commenced. Intelligence assessments on this point are classified.

Iran's pre-strike breakout timeline was estimated at 10-14 days. If the centrifuge infrastructure is truly destroyed, this timeline extends to years. But if any enrichment capability survives at Fordow, and if the enriched uranium stockpile was preserved, breakout could remain possible at a reduced but non-zero capacity.

IAEA Monitoring Blackout

The International Atomic Energy Agency has declared a complete monitoring blackout — all cameras, sensors, and inspection access have been lost since the strikes began. This means the international community cannot independently verify the status of Iran's enriched materials. Track the evolving nuclear situation on our Nuclear Tab.

Frequently Asked Questions

Were Iran's nuclear sites destroyed?

Coalition strikes have hit 6 of 8 known Iranian nuclear facilities, causing significant damage to centrifuge halls and infrastructure. However, Iran's deeply buried Fordow facility, built inside a mountain, may have survived with partial capability. The IAEA has lost monitoring access. Track damage assessments on our <a href='#nuclear'>Nuclear Tab</a>.

How close was Iran to a nuclear bomb?

Before the strikes, Iran had accumulated approximately 440.9 kg of highly enriched uranium (60% enrichment) and was estimated to be 10-14 days from weapons-grade enrichment. See our <a href='/guide/nuclear-breakout-timeline/'>Nuclear Breakout Timeline</a> analysis.

What is the IAEA saying about Iran's nuclear program?

The IAEA has declared a 'monitoring blackout' — all surveillance cameras and monitoring equipment at Iranian nuclear sites have gone offline since the strikes began. The agency cannot verify the current status of enriched materials. This is tracked on our <a href='#nuclear'>Nuclear Tab</a>.

Related Intelligence Topics

Nuclear Breakout Timeline Uranium Enrichment Explained IAEA Safeguards Explained Nuclear Status Tracker B-2 Spirit Stealth Bomber GBU-57 Massive Ordnance Penetrator
NuclearIranNatanzFordowIAEAUranium EnrichmentBreakout Timeline