Los Angeles

Tom Petty goes to work in a Van Nuys warehouse next to an auto shop and an upholsterer. His band the Heartbreakers rehearses there, still looking for ways to improve after more than 30 years together. On paper, Mr. Petty rivals other acts who have lasted for decades, such as Bruce Springsteen or Neil Young. He's sold some 60 million albums, is ubiquitous on classic rock stations and has collaborated with music legends from Bob Dylan to George Harrison. Last year, he played the Super Bowl and much of the nation...