After arduous six-party talks, North Korea agreed to shut down its main nuclear reactor and eventually dismantle its atomic weapons program, just four months after the communist state shocked the world by testing a nuclear bomb. The deal marks the first concrete plan for disarmament in more than three years of six-nation negotiations, and could potentially herald a new era of cooperation in the region. Ted Chen discusses the situation with author and Gordon Chang, journalist and author of Nuclear Showdown: North Korea Takes On the World (Random House, 2006). Also joining the conversation is Joseph Cirincione of the Center for American Progress and member of the Council on Foreign Relations. His book Bomb Scare: The History and Future of Nuclear Weapons (Columbia University Press) will be published in March.