"The weak ones fall, the strong carry on." When Tom Petty offers those words on "Straight into Darkness," he may as well be singing about his career, which has produced a steady output of punchy power pop that's made him an impervious fixture in American music. Petty first made the scene in the '70s with his Heartbreakers, offering tales of blue-collar outsider love that employed the Byrds' sunny 12-sting sonance to achieve an indubitably apple pie aftertaste; it all began, appropriately, with t ...