As Director and Co-Director of the Belfer Center, Ash Carter and Eric Rosenbach have inherited from Graham Allison the world’s No. 1-ranked university think tank. They intend to build on that success by sustaining the Center’s core mission while widening its aperture; enhancing its unique ability to leverage science and technology to meet global challenges; and priming the next generation of leaders in both scholarship and policymaking.

From sharply rising tensions with a nuclear North Korea and decertification of the Iran nuclear deal to China’s growing global assertiveness and the State Department pullback from projecting American values, such as democracy and human rights, around the world, the United States faces urgent national security challenges.

In a panel discussion Monday evening at Harvard Kennedy School (HKS) moderated by MSNBC host Rachel Maddow, former members of President Obama’s cabinet described what they see as a fraying of alliances, a loss of credibility with allies and enemies, a stepping back as a leader on human rights and democracy, and a relinquishment of diplomacy as a critical component of national security.

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

Ashton B. Carter contributes a chapter to McGraw-Hill's new volume on Weapons of Mass Destruction and Terrorism.

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 delivers remarks on the Origins of the Nunn-Lugar Program at the Presidential Conference on William Jefferson Clinton: The “New Democrat” from Hope, hosted by Hofstra University, November 10-12, 2005.

The gravest threat facing Americans today is a terrorist detonating a nuclear bomb in one of our cities. The National Security Advisory Group (NSAG) judges that the Bush administration is taking insufficient actions to counter this threat.

Interim Report from the Policy Advisory Group (PAG), a panel of experts convened to provide advice to the Senate Foreign Relations Committee on what Congress and the administration should do to strengthen the NPT system.