The Rev. C.T. Vivian had been on the buses with the freedom riders, protesting segregation at interstate bus terminals. U.S. Rep. John Lewis had been beaten after crossing a bridge in Selma, Ala., during a march for voting rights. Ambassador Andrew Young, an adviser to Dr. Martin Luther King, Jr., was in Memphis with Dr. King when he was shot. The three civil rights leaders came together recently to discuss what volunteers can learn from the civil rights movement.