Journalist Mark Whitaker says that much of what's happening American race relations today traces back to 1966, the year when the Black Panthers were founded and the Black Power movement took full form. It's also the year when when Stokely Carmichael replaced John Lewis as chair of the Student Nonviolent Coordinating Committee (SNCC), and challenged the tactic of non-violence. Whitaker examines the pivotal year in his new book, Saying It Loud: 1966 — The Year Black Power Challenged the Civil Rights Movement.