Plot: Guests include: Muhammad Ali, Miriam Makeba, Nikki Giovanni, Jerry Butler, Horace Silver, Bobbi Humphrey, Gladys Knight and the Pips, Al Green, Vertamae Grosvenor, Merry Clayton, The Reverend Jesse Jackson, The Dells, Sidney Poitier, Harry Belafonte, Ruby Dee, Ossie Davis, Rahsaan Roland Kirk, Gerry Bledsoe, Amiri Baraka, Tito Puente, Willie Colon, Ron O'Neal, Carmen McRae, Cicely Tyson, Stevie Wonder, and others.