"League of Denial: The NFL's Concussion Crisis" covered this well... http://www.pbs.org/wgbh/frontline/film/league-of-denial/ http://www.pbs.org/wgbh/frontline/

"League of Denial: The NFL's Concussion Crisis" covered this well... http://www.pbs.org/wgbh/frontline/film/league-of-denial/ http://www.pbs.org/wgbh/frontline/film/league-of-denial/