Tonight's episode features dancing with dogs, biblical scholar/food writer Bruce Feiler, Wal-Mart's deadly secret and cross words for The New York Times. (0:31)
"Survivor" splits up its contestants by race, Willie Nelson is busted for pot, and Frank Rich discusses his new book, "The Greatest Story Ever Sold." (0:39)
Bill Gates worries about American competitiveness, high school students get an F in religion and Stephen interviews New York Times columnist Nicholas Kristof. (0:32)
Questions about Barack Obama's patriotism threaten to overshadow questions about Barack Obama's blackness, and Stephen's book finally comes out. (0:34)
Scientists find a new Earth-like planet, The New York Times encourages presidential candidates to debate the environment, and guest Bill Bradley talks about oil and ice cream. (0:33)