Support WBURBrain Scans And Big Screens: Dangers Of Concussions, On And Off The FieldPlay07:32Download AudioNPR StaffJanuary 03, 2016 ShareA photo of former Chicago Bears Dave Duerson, while he was playing at Notre Dame, hangs behind his son Tregg as Tregg announces a wrongful death lawsuit against the NFL in 2012. (AP)
