'Concussion' Doctor Brings NFL Fight to Capitol Hill

Dr. Omalu, the subject of the film "Concussion," brought his fight to the Hill.

"I've never been anti-NFL or anti-soccer or anti-football," Omalu said. "I'm rather about empowerment of enlightenment and knowledge."

Dr. Omalu is a forensic pathologist and neuropathologist who first published findings on the impact of Chronic Traumatic Encephalopathy on football players. He spent years researching traumatic brain injuries seen in athletes and even war veterans before making his discovery.

CTE, which is caused by trauma to the brain, is a form of progressive degenerative disease.

"There is no helmet today, as I'm speaking to you, that will stop your brain from bouncing around in your skull," Omalu said.

“It is long-past due for Congress to take a comprehensive examination of concussions and traumatic brain injuries," Murphy said.

Speier says the nation should be worried about the future of children who play physically aggressive sports.

"This is a chance to shine a bright light on the scientific consensus that the NFL has failed to adequately address,” Speier said. "If the NFL is as serious about protecting its players as it says, it needs to accept the science and make a real effort to combat CTE," Speier said.