Steve Vaught tells everyone he's walking across America because he's fat and doesn't want to be. He fears he'll be dead before his children grow up. "There aren't that many 50-year-old 375-pound guys waddling around," he says with a smile. Vaught, 39, who lives in Valley Center with his wife and two kids, began walking from Oceanside April 10, bound for New York City. But if you sit and talk with Vaught, he'll eventually tell you there's more to his story than excess weight. He has demons that need exorcising, memories that need to be dealt with. Fifteen years ago,...