Published in The Print on June 24, 2025

Israeli Prime Minister Benjamin Netanyahu is delighted that his gamble has paid off. After decimating Iran’s proxies – Hamas and Hezbollah, and substantially weakening Iranian air defences through air strikes last year, Netanyahu was convinced that this was the most opportune moment to target Iran’s nuclear and missile programmes. The challenge was to get US President Donald Trump to join him in the exercise.

And Trump did. In the early hours of June 22, the US targeted three nuclear locations in Iran: Fordaw, Natanz (another enrichment site), and Isfahan (a uranium conversion site). After declaring that the nuclear sites were “totally and completely obliterated,” Trump added, “NOW IS THE TIME FOR PEACE.”

Hours later, Iran responded with a missile strike on US forces at the Al Udeid air base in Qatar, causing no damage or casualties. The move appears to have been a choreographed exercise, reminiscent of Iran’s retaliation in January 2020after Quds Force General Qassem Soleimani was killed in Iraq. Meanwhile Trump has declared that “a full and complete ceasefire” will be in effect shortly, though neither Iran nor Israel has confirmed it yet.

Iran’s nuclear programme – a long journey

Iran’s nuclear journey has been long and tortuous. It began under the Shah’s regime in the 1950s with a civil nuclear cooperation agreement signed with the U.S. and the first research reactor went critical in 1967. Since then, the nuclear programme has been seen as a symbol of scientific progress and a source of nationalist pride.

Iran became an original state party to the Nuclear Non-Proliferation Treaty (NPT) in 1970 when it entered into force, placing all its activities under International Atomic Energy Agency (IAEA) safeguards. The Shah embarked on an ambitious civil nuclear power generation programme signing cooperation agreements with Germany and France. Siemens began work on the Bushehr power reactors (2x1200MW) in 1975 but later withdrew. The plants finally went online in 2011 with Russian assistance.

After the Islamic Revolution, nuclear activity came to a standstill as the clerical regime saw it as a source of Western influence. However, sometime in the 1990s, opinions changed and gradually, nuclear research activities were gradually revived. By then, nuclear controls had tightened, curbing exports of enrichment and reprocessing technologies, though these remained permitted under the NPT. Iran revived its civilian nuclear power projects and, also began establishing a clandestine enrichment facility. It received assistance from the A. Q. Khan network as also from China to develop capabilities across the entire nuclear fuel cycle. In parallel, Iran began developing missiles.

In 2002, the nuclear activity was exposed by a group of Iranian exiles. It became clear that the regular IAEA inspections had failed to detect the clandestine programme. Negotiations began in 2003, initially with the three European powers and later including the U.S. These collapsed when President Mahmoud Ahmedinejad took over and starting in 2006, Iran was subjected to successive UN Security Council sanctions. By this time Iran had established its first enrichment facility at Natanz.

Around that time, Supreme Leader Ali Khamenei issued a fatwa against nuclear weapons, describing them as un-Islamic. The general assessment is that while the fatwa was respected, Iran pursued the technical capabilities to become a nuclear threshold state. As recently as March 26, the U.S. Director of National Intelligence stated in an official briefing to the Congress: “The Intelligence Community continues to assess that Iran is not building a nuclear weapon and Supreme Leader Khamenei has not authorised the nuclear weapons programme that he suspended in 2003”. This assessment has also been made by Rafael Grossi, Director General of the IAEA.

Can Iran remain a nuclear threshold state?

In 2009, a hitherto secret underground enrichment facility at Fordaw was exposed. Israel and the U.S. cooperated in the 2008 Stuxnet covert operation, which destroyed a large number of centrifuges before the Iranians discovered the computer malware in 2010. Thereafter, Iran expanded its uranium enrichment programme, leading eventually to talks that culminated in the Joint Comprehensive Plan of Action (JCPOA) in 2015.

Under the JCPOA, Iran accepted rigorous IAEA inspections and permanent camera monitoring. However, beginning 2019 – one year after the U.S. withdrew from the JCPOA – Iran began scaling back its adherence to the additional inspection measures, observing only the basic safeguards mandated by the NPT. On May31, an IAEA report revealed that Iran had rapidly increased its stockpile of 60% enriched uranium to 408 kg, enough to be enriched further relatively quickly to weapons-grade (90%) levels, and sufficient for approx. 8-10 bombs. On June 12, the IAEA declared – for the first time in over 20 years – that Iran was non-compliant with its nuclear obligations under the NPT. Israel, which is not a party to the NPT, struck on June 13, and the U.S. followed on June 22.

All major nuclear sites – including the research reactor in Tehran, enrichment facilities at Natanz and Fordaw, the heavy water reactor at Arak, the fuel fabrication and research reactor at Isfahan, and the suspected military site at Parchin – have been repeatedly targeted. There are questions about the extent of damage to the centrifuges, particularly at the underground sites at Fordaw and Mt Kolang Gaz La near Natanz. The whereabouts of the 408 kg of 60% enriched uranium also remain a matter of speculation. IAEA monitoring has not detected any enhanced radioactivity around the sites. Further details will only emerge after the IAEA resumes inspections, contingent on renewed talks between Iran and the U.S. and the prospect of a new deal.

Meanwhile, Iran’s leaders are likely to conclude that remaining a nuclear threshold state is a dangerous position to be in, especially when the adversary is a nuclear-armed state. The Ukraine war and the use of nuclear sabre rattling further underscores this lesson. Other countries in Asia are also likely to draw their own conclusions, revealing the growing fragility of the global nuclear regime.

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