Marian Wright Edelman; RFK Remembered; Fittipaldi Wins Indy 500; Lawrence Grossman

Marian Wright Edelman, founder and president of the Children's Defense Fund, addresses issues of child immunization, earned income tax expansion, and upgrading the Head Start Program; Robert F. Kennedy is remembered by friends and colleagues Senator Harris Wofford, former press secretary Edwin Guthman, Marian Wright Edelman of the Children's Defense Fund, and journalist Nicholas Lemann; Indy 500 winner Emerson Fittipaldi and "60 Minutes" anchor Morley Safer compare the Indy 500 to Formula One racing, and decide which is more challenging; Lawrence Grossman, president of PBS, introduces his new cable network, Horizons TV, which will cover cultural events targeted to a niche audience.