Shooting down a ballistic missile with another missile has been likened to hitting one bullet with another bullet. But it's the basic idea behind America's missile defense system, which was resurrected by the Bush Administration a few years ago. We'll have an update on the program. Also, we'll have a chat with open source guru Tim O'Reilly. Finally, we'll revisit the question: who controls the internet? The World's Technology Podcast is sponsored by Ipswitch Incorporated, the leader in messaging, network management, and data management software for small and medium sized businesses around the globe. Visit www.ipswitch.com to download full-function trial versions.