ROCK BOX by Ryn-DMC: How one song tore down the barriers between rock & hip hop, race and class on American radio and television.

ELEVATORS by OutKast: Hip hop's southern voice breaks through with an unsuspecting song that redefines rap's cultural and geographic boundaries.

THE BRIDGE by Marley Marl and MC Shan: A song designed to foster community pride, ignites hip hop's most epic rap battle.