What effect will Colin Powell's endorsement have on the presidential race? And how divided are conservatives? We speak with John Harwood, chief Washington correspondent for CNBC and political writer for The New York Times.

In another of our ongoing series about where the presidential candidates stand on the issues, we look at Barack Obama and John McCain's positions on energy and the environment.

Many older people are continuing to work well into their golden years. Some keep working to stay active. For others, in the current uncertain economy, it's a necessity.

We speak with Dr. Stephen Josephson, a clinical psychologist and professor at New York Presbytarian Weiss Cornell Medical Center, about the mental health needs of executives who have lost their jobs.

Is txting ruining the Englsh language? Linguist David Crystal says no and explains it in a new book, Txting: The Gr8 Deb8.