In the '70s, L.A. bands like The Eagles dominated the radio charts. But as the decade wound down, another sound was hitting the southland: punk rock. It was a movement that lasted just a few short years, but it marked a pivotal and influential moment. Now, musician John Doe, co-founder of the band X, has teamed up with music industry veteran Tom DeSavia on a new book called "Under the Big Black Sun: A Personal History of L.A. Punk."