President Barack Obama announced Monday that he has nominated Dr. Ashton B. Carter to serve as Under Secretary of Defense for Acquisition, Technology and Logistics.

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

The Preventive Defense Project convened a workshop of leading federal government civilian and military officials, scientists, policy experts, and journalists in Washington, D.C. to address "The Day After: Action in the 24 Hours Following a Nuclear Blast in an American City."

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.

Remarks by Ashton B. Carter at the 36th IFPA-Fletcher Conference on National Security Strategy and Policy, Washington, DC.

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.

Dr. Ashton B. Carter testifies before the 9/11 Public Discourse Project's hearings on "The 9/11 Commission Report: The Unfinished Agenda."