Watch a two-hour special that peeks behind the centerfolds and reveals how Hugh M. Hefner's 'Playboy' magazine became a worldwide empire, challenged social conventions and helped galvanize attitudes about civil liberties and civil rights.

Learn about vocalist Marian Anderson and how she became the first African American to perform with the New York Metropolitan Opera. Anderson broke barriers with the help of Eleanor Roosevelt and JFK and later contributed to the Civil Rights Movement.