The arc of innovative progress has reached an inflection point, writes Ash Carter in The Atlantic. "Recent technological change that has brought immeasurable improvements to billions around the globe now threatens to overwhelm us. Making this disruption positive for all is the chief challenge of our time. We ourselves—not only market forces—should bend the arc of change toward human good. To do so, we must reinvigorate an ethos of public purpose that has become dangerously decoupled from many of today’s leading tech endeavors."

This report of the International Security Advisory Board (ISAB) offers nineteen recommendations for discouraging a cascade of nuclear weapons states.

Failure to develop a comprehensive contingency plan, such as the one proposed here, and inform the American public, where appropriate, about its particulars will only serve to amplify the devastating impact of any nuclear attack on a U.S. city

Carter's update to his July/August 2006 Foreign Affairs essay "America's New Strategic Partner?"

The Preventive Defense Project conducted a Washington WMD Workshop entitled "Iran Plan B Design" to collect the best thinking on the design of a plan for dealing with Iran's nuclear program should diplomacy fail and the Iranians continue on the path to nuclear capability.

In 2006, the U.S. and Indian governments struck a deal that recognizes India as a nuclear weapons power.  Critics say Washington gave up too much too soon and at a great cost to nonproliferation efforts.  Perhaps.  But India could in time become a valuable security partner.  So despite the deal’s flaws and the uncertainties surrounding its implementation, Washington should move forward with it.

Former Clinton administration officials Ashton Carter and William Perry argue that the most effective way to curb the threat from Pyongyang is to destroy its missiles at their test sites

Should the United States allow a country openly hostile to it and armed with nuclear weapons to perfect an intercontinental ballistic missile capable of delivering nuclear weapons to U.S. soil? We believe not. If North Korea persists in its launch preparations, the United States should immediately make clear its intention to strike and destroy the North Korean Taepodong missile before it can be launched.

Dr. Ashton B. Carter testifies before the Senate Committee on Foreign Relations.

A multinational solution for keeping states out of the nuclear weapons business.