Seven million people around the world suffer from Parkinson’s Disease. One of those people is Jon Palfreman, a science journalist who dived into the current research on the disease as it worked its way through his body. This hour, we’ll talk with him about how close we are to a cure, the topic of his book “Brain Storms: The Race to Unlock the Mysteries of Parkinson’s Disease” (Farrar, Straus and Giroux).