DJ Grandmaster Flash and his group the Furious Five were hip-hop's greatest innovators, transcending the genre's party-music origins to explore the full scope of its lyrical and sonic horizons. Flash was born Joseph Saddler in Barbados on January 1, 1958; he began spinning records as teen growing up in the Bronx, performing live at area dances and block parties. By age 19, while attending technical school courses in electronics during the day, he was also spinning on the local disco circuit. Over time, he developed a series of groundbreaking techniques including "cutting" (mov...