Kids on BMX bikes speed around a dirt track — racing along rolling hills and veering up steep embankments. They’re at Woodward Park in Fresno learning how to ride motocross style. The sport teaches discipline and self-confidence, says Tony Hoffman — traits that might keep kids from doing drugs such as painkillers, which are a growing problem in the Central Valley. “You’ve got to stay away from these key things if you want to be successful in life, if you want to avoid … More