Will Smith says sports drama "Concussion" is personal for him

Hollywood star Will Smith deals with football-related brain trauma in "Concussion", a sports drama which has already drawn some controversy ahead of its release. The film tells the story of Nigerian-born forensic pathologist Dr Bennet Omalu, who diagnosed Chronic Traumatic Encephalopathy (CTE), a degenerative brain disease, in U.S. football players. In September, the New York Times reported Sony Pictures Entertainment executives had altered the movie's script to avoid antagonizing the National F