In the early 1990s, rap music was sounding angry, even militant. Today, many of those angry young men are mainstream movie and TV stars. So what on earth happened to hip hop over the 90s? How did all the rage against the machine get co-opted? Hip Hop journalist Bakari Kitwana and advertising creative director Reginald Jolley explain how attacking mainstream culture appealed to Madison Avenue as much as to inner-city kids. Produced by Jonathan Mitchell.