A reporter talks to the parents of Jake Powers, a four-year-old boy who has been diagnosed with a number of mental illnesses in his short life. First told their son had autism, the Powers were later told he had bipolar disorder, intermediate explosive disorder, and attention-deficit hyperactivity disorder. But experts say the Powers' experience is not unusual, since a child's diagnoses can change as he or she moves through childhood into adolescence. The reporter discusses this process with the...