Sports, Concussions, and Brain Trauma

John Branch, New York Times sports reporter and author of the three-part series “Punched Out: The Life and Death of a Hockey Enforcer,” about Derek Boogaard, a professional hockey player; Alan Schwarz, New York Times education reporter and formerly a sports reporter whose coverage of concussions in sports was nominated for a Pulitzer prize; and Dr. Robert Cantu, neurosurgeon and co-director of the Center for the Study of Traumatic Encephalopathy at Boston University School of Medicine, discussing the link between contact sports, concussions, and degenerative brain conditions.