Vin Weber; Bill Moyers; Carl Sagan

Vin Weber talks about the significance of the first 100 days of the 104th U.S. Congress and the "Contract with America." Journalist Bill Moyers talks about his return to public television with a three-night special called "What Can We Do About Violence?" Cosmologist Carl Sagan introduces his latest book, "Pale Blue Dot: A Vision of the Human Future in Space," and discusses the necessity of space exploration.