Tom Petty hails rock's subversive power at Grammy gala

Tom Petty declared himself a willing part of the subversive "conspiracy" of rock and roll as he was honored in a star-studded bash ahead of the Grammy Awards. A-listers including Stevie Nicks and Foo Fighters interpreted Petty's songs Friday night at MusiCares, an annual concert that celebrates an artist's contributions and raises money for musicians in need. In a speech to the gala, which takes place ahead of Sunday's Grammys, Petty delved into the history of rock 'n roll, a term credited to th