The arc of innovation has reached an inflection point: technological change now threatens to overwhelm us. Discovery is unstoppable, but it must be shaped for good. We ourselves—not just market forces—must manage it.

Ash Carter discusses public service, opening the military to transgender troops, and North Korea's latest missile launch with actor Jim Parsons on his SiriusXM radio show "Jim Parsons Is Too Stupid For Politics."

"Iran's continued pursuit of an illicit nuclear program and North Korea's rash intimidation after sinking a South Korean navy ship are but the most recent reminders of the real need for effective U.S. missile defenses," write Under Secretary of Defense for Policy Michele Flournoy and Under Secretary of Defense for Acquisition, Technology and Logistics Ashton Carter.

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 National Security Advisory Group report provides a new comprehensive strategy for reducing nuclear threats and preventing nuclear terrorism.

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."

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

The U.S. has no choice but to adopt a two-pronged strategy towards China: one prong of engagement to encourage China to be a "responsible stakeholder" and another prong of hedging against the prospect of a downturn in relations.

Dr. Ashton B. Carter and Jennifer C. Bulkeley offer recommendations for America's strategic response to China's military modernization.