Long before becoming music icons, Jimmy Iovine and Dr. Dre chart out separate career paths in the 1980s.
Dr. Dre pioneers gangsta rap with N.W.A; Jimmy Iovine burnishes his reputation as a superstar producer.
Iovine charts a new course with Interscope Records; Dr. Dre moves past N.W.A., with combustible results.
Dre and Jimmy strike gold with Eminem and others; how the threat of free online music led to Beats, and an Apple megadeal.