Questions about Barack Obama's patriotism threaten to overshadow questions about Barack Obama's blackness, and Stephen's book finally comes out. (0:34)
Questions about Barack Obama's patriotism threaten to overshadow questions about Barack Obama's blackness, and Stephen's book finally comes out. (0:34)
Stephen tips his hat to The New York Times after his book hit number one, but wags his finger at neuroscientists at U.C. Berkeley for saying that people need sleep. (3:43)