Related Reading:The New Arab Revolt: What Happened, What It Means, and What Comes Next, CFR ebook

Watch Janet Napolitano, U.S. secretary of homeland security, address the threat of networked terrorist organizations and the Department of Homeland Security's strategy to prevent and respond to them.

PAUL STEIGER: Good morning. Good morning. I'm Paul Steiger. I'll be your presider today. Welcome to today's Council on Foreign Relations meeting. Today, participants around the nation and the w…

DOUGLAS G. BRINKLEY: Good evening, everybody. Hello. Good evening. I'm historian Douglas Brinkley, and it's a great honor as always to be here at the council, but particularly to get to introduce to…

Newsweek editor-at-large, Evan W. Thomas III discusses U.S. military history and the various reasons that former presidents have gone to war. This meeting is part of a series hosted with the Nationa…