With both John Edwards and Rudy Giuliani out of the race, what lies ahead on the campaign trail? We check in with David Hawkings, managing editor for Congressional Quarterly Weekly.

Students at 1500 high schools and colleges across the country are participate in a teach-in on global warming.

Is the workplace a place where political talk, or demonstration of support for a certain candidate, should be off limits? We pose that question to two experts in the field: Bruce Barry, professor of management and sociology at Vanderbilt University, and author of the book "Speechless: The Erosion of Expression in the American Workplace" and Bruce Weinstein, who writes the "Ethics Guy" column for BusinessWeek.com.

The recent triumph of Sony's Blu-Ray high definition video disc as the standard format for high definition video discs may be a pyhrric victory. As Spectrum Radio's Steven Cherry reports the days of the discs may soon be coming to an end with the explosion of downloadable movies and television shows via the internet.

The children's book author has just been named the first National Ambassador for Young People's literature. He also is the founder of Guys Read, a program that encourages boys and men to read more. We talk to him about getting kids to read, and about his new book "Smash! Crash!".