FBI Director Robert Mueller tells Bob Orr what the United States is doing to try to keep small nuclear devices away from terrorists - and what could happen if it fails. watch
CBS News Exclusive: FBI Director Robert Mueller talks with Bob Orr about the growing threat of a nuclear attack against the U.S. and what authorities must do to prevent it. watch
"Only On The Web": Robert Fram of the FBI's Scientific Analysis Section speaks to Bob Orr about the Bureau's national DNA database, and the robots used to process a huge backlog of evidence samples. watch
