it was later disclosed that duerson suffered from moderately, advanced, unquote, traumatic encephalopathy. repeated blows to the head which can result in memory loss, depression and dimentia. heaton and scurry stories that career ending sports injuries can occur at any little of competition and the duerson case should make it clear the impact of brain trauma go beyond the athlete's stay on the field and become more severe over time. we'll hear from medical and scientific experts who study the impact of injuries on athletes of all ages. we'll hear about the importance of taking athletes off the field of play as soon as there is suspicion of a brain injury and keeping them off until cleared by a responsible and trained individual. finally we're hear from the nhl, the nfl and youth hockey and football leagues that are responsible for mitigating traumatic brain injury in their sports. i hope to learn what changes they have implemented and will implement to rules, practice drills and other aspects of games that will reduce the risk of brain injury moving forward. i'm not advocating for an end