Multiracial social networks needed to quash racism in U.S., professor says

In May 2005, comic Dave Chappelle shocked fans by walking off the set of his popular TV series, "Chappelle's Show," for no apparent reason. Dave Chappelle, whose show turned racial stereotypes on their heads, later explained that he was performing a skit in blackface when he noticed a white crew member laughing in a way that made him uncomfortable. Chappelle thought the white guy had missed the satire and was laughing for the wrong reason. Some pundits dismissed the performer as paranoid. Was he?