Non-proliferation

Highlights:

An Iranian woman walks past a mural depicting late Iranian supreme leaders Ayatollah Ali Khamenei (L) and Ayatollah Ruhollah Khomeini (R) in Tehran on June 18, 2026.

Time to Repeal INARA and Move Forward with the Iran MoU

The Iran Nuclear Agreement Review Act should be repealed or amended. The alternatives are extending a disastrous war of choice or ignoring the law.
Collage of the Israel-Iran conflict

Collection: Iran, Israel and the United States at War (2025-2026 Operations)

Experts analyze the US-Israel Iran military conflicts - covering nuclear diplomacy; strategic, security, and regional implications; and domestic and international law.
Flags of USA and Iran

Top Experts’ Backgrounder: Military Action Against Iran and US Domestic Law

Experts who advised a president on use of force answer a full range of basic questions on the conditions under which action against Iran would be lawful, and what options Congress…
Light gray colored missiles with "JL-1" markings on the side rest atop camouflage-painted truck beds arrayed in a square in front of a massive columned building.

The End of Treaty Nostalgia: Arms Control After New START

New START’s expiration highlights the limits of arms control designed for an earlier era of bilateral rivalry, without accounting for factors such as China's buildup.
Abraham Lincoln (CVN 72) sails alongside Arleigh Burke-class guided-missile destroyer USS Frank E. Petersen Jr. (DDG 121) and Lewis and Clark-class dry cargo ship

Expert Q&A: Are U.S. Threats or Use of Force Against Iran Lawful?

Experts examine the international law issued raised by the U.S. threats and potential strikes against Iran.
Protesters hold Iranian pre-Islamic revolution of 1979 flags in front of the United Nations office in Geneva​, Switzerland on February 17, 2026.

What the Current Crises Facing Iran Mean for Human Rights and Rules on the Use of Force

The human rights crisis in Iran reveals the limits of a legal system designed to restrain force even when restraint carries profound human costs.
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48 Articles
Crown Prince and Prime Minister of the Kingdom of Saudi Arabia Mohammed bin Salman (2nd-L) arrives at the US Capitol to meet with bipartisan leaders on November 19, 2025 in Washington, DC. (Photo by ROBERTO SCHMIDT/AFP via Getty Images)

How Congress Should Judge a Saudi Nuclear Cooperation Agreement

In reviewing a U.S.-Saudi Section 123 nuclear agreement, Congress must weigh nonproliferation safeguards, enrichment and reprocessing limits, and its national security impact.
Visualization of nuclear risk

In 2026, a Growing Risk of Nuclear Proliferation

In 2026, it is highly likely that countries such as South Korea and Saudi Arabia will move closer to developing the technical means—and political motivation—to build a bomb.
A 3D render of a world map with a nuclear warning symbol attached

What Lies Ahead for Nuclear Technology and Security in 2026

In 2026, the nuclear order will become more fragmented, less predictable, and increasingly difficult to govern through existing institutions.
Iranians gather while blocking a street during a protest in Tehran, Iran on January 9, 2026. The nationwide protests started in Tehran's Grand Bazaar against the failing economic policies in late December, which spread to universities and other cities, and included economic slogans, to political and anti-government ones. (Photo by MAHSA / Middle East Images / AFP via Getty Images)

Military Force Will Not Help the People of Iran

This is an Iranian uprising, and it is up to the people of Iran to decide their own future.
U.S. President Donald Trump (R) and South Korean President Lee Jae-myung talk to reporters before an Oval Office meeting at the White House on August 25, 2025 in Washington, DC. During Lee's first official visit to the White House, the two leaders are set to discuss trade and military cooperation to counter North Korea and China, South Korea's top trade partner. (Photo by Chip Somodevilla/Getty Images)

Legal and Policy Options for a U.S-South Korea Nuclear Submarine Program

Trump’s announcement 'approving' a nuclear-powered submarine plan with South Korea contradicts U.S. law requiring specific terms, agreements, and congressional review.
Visualization of nuclear weapons against a yellow background

Could “A House of Dynamite” Spark a Public Rethink of Nuclear Risk?

There’s no shortage of opportunities to reduce the chances that a war game – or the plot of “Dynamite” – is never played out in real-time.
Workers wearing hard hats stand in a desert landscape under and around a long tube-like structure suspended from cables overhead. The tube appears to have differently sized and shaped compartments and equipment inside, and extending from the near end in the direction of the right side of the photo are numerous sets of cables in different colors, possibly connected to something offscreen.

Trump’s Nuclear Testing Remark Was a Signal — Not a Strategy

The science is sound, the stockpile is strong, and the call to test a nuclear bomb has no technical foundation. Resuming testing would not make America safer.
Marshall Islands president Hilda Heine speaks during the General Debate of the United Nations General Assembly at the UN headquarters in New York City on September 24, 2025. (Photo by Leonardo MUNOZ / AFP) (Photo by LEONARDO MUNOZ/AFP via Getty Images)

A Human Rights Approach to Nuclear Regimes: Lessons from the Legacy of Nuclear Testing in the Marshall Islands

Acknowledgement and respect for human rights can encourage States, like the Marshall Islands, to join and actively participate in nuclear regimes.
(L-R) French President Emmanuel Macron, Germany's Chancellor Friedrich Merz and British Prime Minister Keir Starmer pose for the media at a hotel prior to an E3 meeting on the sidelines of the 2025 NATO summit on June 24, 2025 in The Hague, Netherlands. (Photo by Ben Stansall - WPA Pool/Getty Images)

What You Need to Know About Iran Sanctions Snap Back at the UN: A Q&A with Kelsey Davenport

On Aug. 28, three European nations triggered snapback of the UN's Iran sanctions. Kelsey Davenport explains its impact, next steps, and why it matters.
The Just Security Podcast

The Just Security Podcast: Is There a Diplomatic Path for Iran’s Nuclear Program? An Interview with Richard Nephew

Just Security’s Tess Bridgeman is joined by Richard Nephew to discuss where things stand and what a path forward for Iran's nuclear program might look like.
U.S. Defense Secretary Pete Hegseth (L), accompanied by Chairman of the Joint Chiefs of Staff Air Force Gen. Dan Caine (R), speaks during a news conference at the Pentagon on June 22, 2025 in Arlington, Virginia. U.S. President Donald Trump gave an address to the nation last night after three Iranian nuclear facilities were struck by the U.S. military. (Photo by Andrew Harnik/Getty Images)

President Trump’s Decision to Bomb Iran: From Bad to Worse

Whether newly announced ceasefire actually leads to end hostilities will not change the new reality: a comprehensive agreement is less likely now than before the bombing
Chairman of the Joint Chiefs of Staff Air Force Gen. Dan Caine discusses the mission details of a strike on Iran during a news conference at the Pentagon on June 22, 2025 in Arlington, Virginia. U.S. President Donald Trump gave an address to the nation last night after three Iranian nuclear facilities were struck by the U.S. military. In the image he is showing the media a graphic that describes the timeline of the operation. (Photo by Andrew Harnik/Getty Images)

The Day After U.S. Strikes on Iran’s Nuclear Program: A Policy and Legal Assessment

An expert policy and legal assessment of the U.S. strikes on Iran's nuclear facilities and what comes next.
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