Alzheimer's Study; Daniel Schorr; Ray Flynn

Epidemiologist David Snowdon and Michael Lemonick, science writer at Time Magazine, talk about a landmark study that links lifestyle and the incidence of Alzheimer's disease. NPR's Daniel Schorr on his book, "Staying Tuned: A Life In Journalism." Ray Flynn discusses his book "John Paul II: A Personal Portrait of the Pope and the Man."