Frontline: League of Denial: The NFL's Concussion Crisis (1)
Preview | 30s
"League of Denial: The NFL's Concussion Crisis" – Part 1. Thousands of former NFL players and a host of scientists claim the league has covered up football's role in causing long-term brain injuries for many players. What did the NFL know and when?
Aired: 12/15/15
Expired: 12/22/15
