Frontline has won a George Polk Award in Journalism for League of Denial: The NFL’s Concussion Crisis, an investigation into the link between football and long-term brain injury.

The report was recognized for 'special achievement in journalism,“ winning the award for network television reporting.

Long Island University, which chooses the winners, writes in its announcement:

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The George Polk Award for Network Television Reporting will go to Michael Kirk, Jim Gilmore, Mike Wiser, Steve Fainaru and Mark Fainaru-Wada for “League of Denial,” a “Frontline” documentary aired on PBS that traced the National Football League’s longstanding efforts to quash evidence linking head injuries suffered by players to an inordinately high level of the brain disease chronic traumatic encephalopathy. The program detailed how physicians on the NFL payroll dismissed independent medical research and demeaned the researchers in a concerted effort to hide the truth.