League of Denial: The NFL’s Concussion Crisis

The National Football League, a multibillion-dollar commercial juggernaut, presides over America’s indisputable national pastime. But the NFL is under assault: scientists have discovered a new disease that appears to be related to playing football; thousands of former players have claimed the league tried to cover up whether football could cause long-term brain injuries. What did the NFL know, and when did it know it? In a special investigation, FRONTLINE investigates how, for years, the league worked to refute scientific evidence that the violent collisions at the heart of the game are linked to an alarming incidence of earlyonset dementia, brain damage and other devastating consequences.