Joan Baez was 18 when she first performed at the Newport Folk Festival. She quickly rose to fame, popularizing songs like "Diamonds and Rust" and "The Night They Drove Old Dixie Down." But the folk singer also quickly established herself as an activist, marching alongside Martin Luther King, Jr. and protesting the Vietnam War. "I sang about what I believed in," she says." Baez joins us in studio and reflects on her music, the influence of her Mexican heritage and the activism still to be done.