Repetitive Head Injuries Link to Degenerative Brain Disease

Aired: 12/3/2012 | 0:09:36 | Clip
A newly-published four-year study at Boston University, which examined the brains of deceased athletes, links repetitive head injuries to a degenerative brain disease called Chronic Traumatic Encephalopaty. Jeffrey Brown talks to Dr. Ann McKee, one of the lead researchers, and ESPN's Mark Fainaru-Wada about the current evidence.