US and Israel wage sustained air campaign against Iran's nuclear infrastructure

Overview

Iran's nuclear infrastructure has become the primary target of an intensifying US-Israeli air campaign that began February 28 and has now entered its sixth week. The Natanz uranium enrichment complex has been struck four times; on April 4, 2026, US and Israeli forces expanded the campaign to strike the Bushehr nuclear power plant and the Mahshahr petrochemical hub in southwestern Iran, killing at least one security guard and wounding five workers. The International Atomic Energy Agency (IAEA) has warned that strikes on civilian nuclear power plants cross 'the reddest line' of nuclear safety, raising the risk of a radiological catastrophe. Meanwhile, Iran has demonstrated growing military capability: on April 4, Iranian air defenses downed two US warplanes, marking the first confirmed loss of American aircraft in the conflict.

Why it matters

A war to prevent Iran's nuclear capability is reshaping the Middle East's security order and threatening global energy supplies through the Strait of Hormuz.

Play on this story Voices Debate Who Said What? Predict

Key Indicators

Strikes on Natanz

The enrichment complex has been hit four times since February 28, with entrance buildings destroyed and the underground facility rendered inaccessible.

~900

Strikes in first 12 hours

US and Israeli forces launched nearly 900 strikes on Day 1, hitting missile sites, air defenses, and leadership targets.

2,300+

Estimated deaths across region

Casualties span at least a dozen countries, including 165 killed at a girls' school adjacent to a naval base in Minab.

US warplanes downed

Iranian air defenses shot down two American aircraft on April 4, marking first confirmed US losses in the campaign.

Ceasefire negotiations

Six weeks into the campaign with no diplomatic talks underway. Iran's foreign minister has stated: 'We never asked for a ceasefire, and we have never asked even for negotiation.'

Interactive

Exploring all sides of a story is often best achieved with Play.

Ever wondered what historical figures would say about today's headlines?

People Involved

Donald Trump

Directing Operation Epic Fury; stated 'practically nothing left to target'

Benjamin Netanyahu

Directing Israeli operations under codename 'Roar of the Lion'

Ayatollah Ali Khamenei

Killed February 28, 2026

Mojtaba Khamenei

Leading Iran's war response as newly appointed supreme leader

Pete Hegseth

Leading Pentagon briefings on Iran campaign

Rafael Mariano Grossi

Monitoring nuclear sites; warning of radiological catastrophe risk following Bushehr strikes

Abbas Araghchi

Rejecting ceasefire talks while offering to dilute enriched uranium

Organizations Involved

International Atomic Energy Agency (IAEA)

UN Agency

Monitoring nuclear sites and radiation levels during active conflict

The United Nations' nuclear watchdog, responsible for verifying that nuclear materials are not diverted to weapons use.

Atomic Energy Organization of Iran (AEOI)

Government Agency

Maintaining operations at unaffected facilities

Iran's civilian nuclear agency, which oversees all enrichment, research, and nuclear energy facilities.

Timeline

US-Israeli strikes hit Bushehr nuclear plant and Mahshahr petrochemical hub; Iran downs two US warplanes
Military

US and Israeli forces struck the Bushehr nuclear power plant and the Special Petrochemical Zone of Mahshahr in southwestern Iran, killing one security guard and wounding five workers. Iranian air defenses shot down two US warplanes, marking the first confirmed American aircraft losses in the six-week campaign. The strikes on civilian nuclear infrastructure represent an escalation in targeting doctrine and raise IAEA concerns about radiological safety.
April 4th, 2026
Fourth strike on Natanz; Iran fires missiles at Diego Garcia and Arad
Military

US and Israeli forces struck Natanz for the fourth time on Nowruz, the Persian New Year. Iran retaliated by firing two intermediate-range ballistic missiles at Diego Garcia (~4,000 km away) — neither hit the base — and striking the Israeli city of Arad with a 450 kg warhead that destroyed three buildings and wounded 64 people.
March 21st, 2026
Iran rejects ceasefire but offers to dilute enriched uranium
Diplomatic

Foreign Minister Araghchi told CBS that Iran was ready to dilute enriched material to lower percentages but rejected ceasefire negotiations, demanding a permanent end to strikes and compensation as preconditions.
March 15th, 2026
Mojtaba Khamenei named Iran's new supreme leader
Political

Ali Khamenei's son was appointed supreme leader eleven days after his father's death, consolidating leadership amid ongoing bombardment.
March 9th, 2026
Iran fires 500+ missiles and 2,000 drones; attacks all six Gulf states
Military

By Day 7, Iran had fired over 500 ballistic and naval missiles and nearly 2,000 drones — approximately 40% at Israel and 60% at US targets. For the first time in history, Iran attacked all six Gulf Cooperation Council countries, hitting energy infrastructure and civilian airports.
March 5th, 2026
IAEA confirms Natanz entrance buildings destroyed
Assessment

Satellite imagery showed entrance buildings at Natanz were damaged, making the underground Fuel Enrichment Plant inaccessible. The core underground facility was not confirmed destroyed. No radiological consequences expected.
March 3rd, 2026
First confirmed strike on Natanz; IRGC headquarters destroyed
Military

Iran's ambassador to the IAEA confirmed Natanz had been struck. The IRGC's Malek-Ashtar building in Tehran was completely destroyed. IAEA convened an emergency Board of Governors meeting.
March 2nd, 2026
US and Israel launch Operation Epic Fury / Roar of the Lion
Military

Nearly 900 strikes in 12 hours targeted Iran's missiles, air defenses, leadership, and military infrastructure. Supreme Leader Khamenei and dozens of senior officials were killed. A strike on a naval base in Minab also hit an adjacent girls' school, killing approximately 165 people.
February 28th, 2026
Oman announces diplomatic breakthrough with Iran
Diplomatic

Oman's foreign minister said Iran had agreed to never stockpile enriched uranium and to accept full IAEA verification. Peace was reportedly 'within reach.'
February 27th, 2026

Scenarios

Predict which scenario wins. Contrarian picks score more — points lock in when the scenario resolves.

Predictions leaderboard

Iran's nuclear infrastructure destroyed; program set back a decade

Continued strikes on Natanz, Fordow, and the deeply buried Pickaxe Mountain facility, combined with the loss of senior leadership and scientific personnel, render Iran's enrichment program inoperable for years. The IAEA gains access to verify dismantlement. This would require penetrating underground facilities that have so far survived surface-level bombardment — and would depend on Iran's new leadership accepting terms rather than pursuing covert reconstruction.

Discussed by: Foundation for Defense of Democracies, Israeli defense analysts, some US officials

Consensus —

War escalates into prolonged regional conflict

Iran's unprecedented attacks on all six Gulf states, the Strait of Hormuz closure, and the Diego Garcia strike signal that the conflict is expanding beyond a contained air campaign. If Iran successfully strikes a major energy facility or demonstrates a reliable long-range missile capability, the war could draw in additional combatants and permanently reshape Middle Eastern alliances. The absence of ceasefire negotiations and the US-Israeli divergence on objectives increase this risk.

Discussed by: Arms Control Association, European foreign ministers, UN Secretary-General Guterres

Consensus —

Negotiated settlement: Iran accepts permanent enrichment limits under verification

The Omani-brokered breakthrough on February 27 showed that Iran was willing to accept permanent enrichment restrictions and full IAEA verification before the strikes began. If the military campaign reaches a point of diminishing returns — or if domestic US or Israeli political pressure mounts — a return to that framework is possible. Iran's March 15 offer to dilute enriched uranium suggests the door is not fully closed, but its preconditions (permanent end to strikes, compensation) remain far from any US or Israeli position.

Discussed by: Former US diplomats, Oman's foreign ministry, arms control advocates

Consensus —

Iran accelerates covert nuclear weapons program

The historical record shows that Israel's 1981 strike on Iraq's Osirak reactor motivated Saddam Hussein to launch a covert weapons program that hadn't existed before. Iran possesses far more scientific expertise, dispersed facilities (including the unmonitored Pickaxe Mountain tunnel complex), and an unknown number of centrifuges produced since barring IAEA monitoring in 2021. Military strikes that destroy verification infrastructure without eliminating all capability could push Iran toward a covert breakout rather than away from one.

Discussed by: Nonproliferation analysts, historical precedent researchers (citing Iraq post-Osirak)

Consensus —

Radiological accident at Bushehr triggers international intervention

A direct hit on Bushehr's reactor or spent fuel pools could release radioactive material across the Persian Gulf region, affecting millions in Iran, Iraq, and the Gulf states. Such an accident would likely trigger emergency UN Security Council sessions, NATO involvement, and a humanitarian crisis that could force an immediate ceasefire. The IAEA has explicitly warned that strikes on civilian nuclear power plants cross 'the reddest line' of nuclear safety.

Discussed by: IAEA Director General Grossi, European foreign ministers, UN Secretary-General

Consensus —

US air superiority challenged; campaign shifts to standoff weapons and cyber operations

The downing of two US warplanes on April 4 demonstrates that Iran's air defenses have adapted or been upgraded. If losses continue, the US may shift from manned aircraft to cruise missiles, drones, and cyberweapons—potentially extending the campaign's duration while reducing immediate escalation risk. This could also signal to Israel that the window for kinetic operations is narrowing.

Discussed by: Pentagon analysts, defense contractors, military strategists

Consensus —

International pressure forces ceasefire; Iran accepts enrichment limits under IAEA verification

The expansion to civilian nuclear infrastructure and the risk of a radiological accident may trigger sufficient international pressure—particularly from Europe, China, and Russia—to force both sides to the negotiating table. Iran's March 15 offer to dilute enriched uranium could form the basis for a settlement that trades permanent enrichment restrictions and full IAEA monitoring for an end to strikes and sanctions relief.

Discussed by: UN diplomats, European Union officials, arms control advocates

Consensus —

Historical Context

Israel's strike on Iraq's Osirak reactor (1981)

June 1981

What Happened

Eight Israeli F-16s destroyed Iraq's French-built Osirak nuclear reactor near Baghdad in a precision airstrike. Israel faced universal condemnation, including from the United States. Ten Iraqi soldiers and one French civilian were killed.

Outcome

Short Term

Iraq's overt nuclear capability was eliminated. Israel suffered diplomatic isolation but no lasting consequences.

Long Term

Evidence uncovered after 2003 revealed the strike motivated Saddam Hussein to launch a covert nuclear weapons program — committing a tenfold increase in scientists and funding. Only the 1991 Gulf War and subsequent inspections dismantled it.

Why It's Relevant Today

This is the foundational precedent for strikes on nuclear facilities — and its central lesson is that military action can accelerate covert proliferation rather than prevent it. The question hanging over the 2026 campaign is whether Iran follows Iraq's post-Osirak path.

Israel's destruction of Syria's Al-Kibar reactor (2007)

September 2007

What Happened

Eight Israeli jets destroyed a covert North Korean-built nuclear reactor at Al-Kibar in eastern Syria. The strike lasted three minutes. Israel maintained total secrecy for over a decade, only acknowledging the operation in 2018. The IAEA confirmed in 2011 that the site was an undeclared reactor.

Outcome

Short Term

Syria's nuclear weapons program was permanently ended. Damascus did not retaliate and initially denied the facility existed.

Long Term

Unlike Osirak, there was no covert restart — Syria lacked the resources and was soon consumed by civil war. This remains the most successful preventive strike against a nuclear facility.

Why It's Relevant Today

Al-Kibar is the model the 2026 planners likely hoped to replicate: a clean strike that ends a nuclear program. But Iran's program is vastly more dispersed, hardened, and advanced than Syria's single early-stage reactor, making a comparable outcome far less achievable.

Stuxnet cyberattack on Natanz (2007–2010)

2007–2010

What Happened

A US-Israeli cyberweapon, codenamed 'Olympic Games,' caused approximately 1,000 of Iran's 5,000 centrifuges at Natanz to spin erratically and destroy themselves while reporting normal operations to human operators. The worm was discovered publicly in June 2010.

Outcome

Short Term

Iran's enrichment capacity was significantly disrupted, with recovery taking until late 2011. US estimates concluded the attack delayed Iran's weapons capability by at least 18 months.

Long Term

The delay was tactical, not strategic. Iran rebuilt and expanded, eventually operating roughly 18,000 centrifuges and enriching to 60% purity. Stuxnet also established the precedent for state-sponsored cyberweapons targeting critical infrastructure.

Why It's Relevant Today

Stuxnet targeted the same Natanz facility now under kinetic attack. It demonstrated that even sophisticated covert sabotage could only delay, not eliminate, Iran's nuclear ambitions — arguably contributing to the logic that only military force could achieve a more permanent result.