The Sentinel Woman

2002

Hidden nuclear sites at Natanz Nuclear Facility and Arak Heavy Water Reactor are publicly revealed after years of undeclared activity to the International Atomic Energy Agency. This marks global awareness of Iran’s secret nuclear work.

2003

The IAEA confirms Iran conducted undeclared uranium enrichment experiments, violating its Nuclear Non‑Proliferation Treaty safeguards. Intelligence points to structured weapons research under the AMAD Plan.

2005–2006

Iran resumes enrichment after negotiations stall. The United Nations Security Council demands Iran halt enrichment and imposes sanctions.

2009

Western and Israeli intelligence expose the secret underground Fordow Fuel Enrichment Plant—previously undeclared.

2011

An IAEA report (drawing in part on intelligence) details Iran’s nuclear weapons–related research, including warhead design linked to the AMAD Plan.

2013

Iran and the P5+1 reach a preliminary nuclear agreement, the Joint Plan of Action, freezing parts of Iran’s program during negotiations.

2015

Iran signs the Joint Comprehensive Plan of Action (JCPOA), limiting enrichment levels, stockpiles, and centrifuge operations.

2016–2018

The IAEA repeatedly reports Iran’s compliance with JCPOA limits. In 2018, the U.S. withdraws from the deal and reimposes sanctions.

2019 — Breaches Begin

Iran exceeds its 300 kg low‑enriched uranium stockpile cap and enriches above 3.67%. Iran restarts enrichment at Fordow and installs advanced centrifuges at Natanz, violating the deal’s limits. 

2020–2021

Iran suspends implementation of the Additional Protocol, reducing IAEA monitoring transparency. It increases production of uranium enriched to 20% and then to 60%, a level near weapons‑grade. 

2022–2023

Iran continues expanding highly enriched uranium production, reducing “breakout time” (the time needed to enrich enough material for a bomb) significantly compared with pre‑JCPOA years. 

2024

IAEA reports increase in Iran’s 60% enriched uranium production and stockpile. Iran’s overall stockpile of enriched uranium climbs above thousands of kilograms, and the 60% share grows, raising proliferation concerns. 

Early 2025

The U.S. tells the IAEA that Iran’s 60% enrichment has “no credible civilian application,” noting Iran is the only non‑nuclear weapon state producing at that level.  IAEA also reports Iran’s 60% enriched stockpile could theoretically be refined to weapons grade in a short period, with quantities rising month to month. 

June 2025

U.S. and Israeli military strikes target major Iranian nuclear sites at Fordow, Natanz, and Isfahan, aiming to disrupt enrichment infrastructure and stockpiles. Iranian facilities are damaged but not entirely eliminated. 

Late 2025

The IAEA warns that verification of Iran’s enriched uranium inventory is “long overdue” because inspectors have not been given access to sites hit in June, delaying accounting for declared nuclear material.  Iran’s cooperation remains limited, and comprehensive inspection access has not been restored.

Early 2026

The IAEA estimates that significant quantities of 60% enriched uranium remain in Iran, particularly in Isfahan, suggesting that nearly half of the stockpile may still be present despite the strikes.  Iran has not granted inspectors full access to damaged or hidden facilities, complicating verification. 

Summary

2002–2015: Discovery of secret sites and weapons‑related research → nuclear deal signed.

2016–2018: Compliance with JCPOA.

2019–2021: Iran begins violating deal limits, expands enriched uranium production.

2022–2025: Rapid growth in high‑level enrichment; stockpiles approach levels close to weapons material.

Mid‑2025: U.S.–Israeli strikes damage nuclear infrastructure; verification remains challenging.

Early 2026: Significant enriched uranium remains under limited inspection access, with Copenhagen concern over rapid potential restart.