The internationally agreed-upon threshold for dangerous global warming is 2 degrees Celsius. But nature doesn’t negotiate.

By asking what if, U.S. policy makers and advisers might find the solutions to restoring the country's credibility abroad.

As talks between Iran and the five permanent members of the UN Security Council and Germany (P5+1) move to Baghdad, leaders and analysts alike are wondering whether diplomacy will be any more successful now than during previous negotiations involving the Obama administration. To answer that question, it is important to understand why the previous talks failed and what is -- or might be -- different now.

China, like all nuclear weapon states, bears a responsibility to provide leadership in nuclear security issues. But China's strategy for securing its nuclear weapons -- and the complex of facilities where fissile material for weapons is fabricated and stored -- has so far remained largely opaque.

With his decision today to withdraw the United States from the Iran nuclear deal, US President Donald Trump has put the long-term future of the deal in doubt, at the very least.

Two nonproliferation experts discuss how Saudi Arabia could become a responsible civilian nuclear power.

At its upcoming summit in Madrid, NATO will issue a new Strategic Concept, the first since 2010. A focal point of the new Strategic Concept is bound to be weapons of mass destruction, because of Russia’s frequent chemical, biological, radiological, and nuclear threats during the Ukraine invasion.

After repeated delays, the 2010 Nuclear Posture Review--just the third such effort since the end of the Cold War--is finished. This document has been by far the most anticipated of its kind. Judging by occasional reports, it has been extensively coordinated and worked over--the hallmarks of a high-priority policy document.

Wrongheaded, fixed ideas have been plaguing the Iran negotiations

The ebb and flow of money is an early indicator of any questionable nuclear activity

Sometimes a good idea comes from a very surprising source.

Einstein said that the atomic age called for a new way of thinking, one that focused on cooperation rather than competition. Why has progress been so slow?

With North Korea having conducted its fourth nuclear test in January, the Korean Peninsula seems more distant than ever from denuclearization. Given this reality, what's the most effective way to approach the nuclear problem? The obstacles to progress are enormous. Pyongyang's inclinations are strongly realist, and the country's leadership sees nuclear deterrence as the ultimate … Continued

Should we drop the NPT treaty entirely, in favor of the Ban Treaty? One seeks to stop the further spread of nuclear weapons, while the other goes further and seeks to get rid of them entirely.

For the Iran nuclear deal to succeed, negotiators must address the billions of dollars’ worth of civil judgements to US victims of Iranian terrorism. If not, Iran may question whether it will ever receive meaningful economic gains in return for limiting or reversing its nuclear ambitions. If the United States proposes that Iran pay a percentage of the proceeds from expanded energy royalties over an extended period, reluctant investors might be reassured about doing business with Iran. In such a case, Iran’s economy could grow, its terrorism victims would gain partial closure, and its nuclear ambitions would be limited or reversed.

What drove Qaddafi to decide to eliminate his proscribed weapons programs? Could those conditions be replicated elsewhere? 

The United States has already learned three important lessons from its failed pandemic response that should inform its nuclear strategy, so it doesn’t repeat similar mistakes in the future: investing in prevention is key; experts matter; and America needs to adjust to a new communications environment.