President Bush says we need a new missile defense system to protect ourselves from ?rogue nations? such as North Korea and Iraq. But critics of the idea say it will create another arms race and that reliable technology for it is still years away. Laura talks with Joseph Cirincione, a Senior Associate at the Carnegie Endowment for International Peace (www.ceip.org) and Peter Huessy, a Senior Associate at the National Defense University (www.ndu.edu)