WASHINGTON - OCTOBER 28: Boston University Clinical Professor of Neurosurgery Dr. Robert Cantu testifies before the House Judiciary Committee about football brain injuries on Captiol Hill October 28, 2009 in Washington, DC. A recent NFL study of retired players suggested that NFL retirees ages 60 to 89 are experiencing moderate to severe dementia at several times the national rate. Getty Images logo Getty Images 1 month ago

WASHINGTON - OCTOBER 28: Boston University Clinical Professor of Neurosurgery Dr. Robert Cantu testifies before the House Judiciary Committee about football brain injuries on Captiol Hill October 28, 2009 in Washington, DC. A recent NFL study of retired players suggested that NFL retirees ages 60 to 89 are experiencing moderate to severe dementia at several times the national rate.

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  1. WASHINGTON - OCTOBER 28: Boston University Clinical Professor of Neurosurgery Dr. Robert Cantu testifies before the House Judiciary Committee about football brain injuries on Captiol Hill October 28, 2009 in Washington, DC. A recent NFL study of retired players suggested that NFL retirees ages 60 to 89 are experiencing moderate to severe dementia at several times the national rate.
  2. Images of brain tissue of a football player who suffered concussions are presented by Dr. Ann McKee, Associate Professor of Neurology and Pathology at Boston University, not pictured, Wednesday, Oct. 28, 2009, during the House Judiciary Committee hearing on legal issues relating to football head injuries.
  3. Buffalo Bills' Lee Evans runs after a catch during NFL football practice in Orchard Park, N.Y., Wednesday, Oct. 7, 2009.
  4. Seattle Seahawks quarterback Matt Hasselbeck stretches during NFL football practice on Wednesday, Oct. 7, 2009, in Renton, Wash. The practice was the first for Hasselbeck since breaking a rib in a Sept. 20 game in San Francisco.
  5. Seattle Seahawks quarterback Matt Hasselbeck stretches during NFL football practice on Wednesday, Oct. 7, 2009, in Kirkland, Wash. The practice was the first for Hasselbeck since breaking a rib in a Sept. 20 game in San Francisco.
  6. Seattle Seahawks quarterback Matt Hasselbeck throws a pass during NFL football practice on Wednesday, Oct. 7, 2009, in Renton, Wash. The practice was the first for Hasselbeck since breaking a rib in a Sept. 20 game in San Francisco.
  7. Seattle Seahawks quarterback Matt Hasselbeck throws a pass during NFL football practice on Wednesday, Oct. 7, 2009, in Kirkland, Wash. The practice was the first for Hasselbeck since breaking a rib in a Sept. 20 game in San Francisco.
  8. NEW YORK - OCTOBER 06: Astronaut Buzz Aldrin and wife Lois Aldrin pose with NFL Hall of Famer Nick Buoniconti at The 24th Annual Great Sports Legends Dinner benefiting The Buoniconti Fund to Cure Paralysis (national fundraising arm of The Miami Project to Cure Paralysis) at The Waldorf=Astoria on October 6, 2009 in New York, New York.
  9. NEW YORK - OCTOBER 06: NFL Hall of Famer Nick Buoniconti and honoree Mike Piazza attend The 24th Annual Great Sports Legends Dinner benefiting The Buoniconti Fund to Cure Paralysis (national fundraising arm of The Miami Project to Cure Paralysis) at The Waldorf=Astoria on October 6, 2009 in New York, New York.
  10. NEW YORK - OCTOBER 06: NFL Hall of Famer Nick Buoniconti and Olympic swimmer Dara Torres attend The 24th Annual Great Sports Legends Dinner benefiting The Buoniconti Fund to Cure Paralysis (national fundraising arm of The Miami Project to Cure Paralysis) at The Waldorf=Astoria on October 6, 2009 in New York, New York.

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  13. This photo, taken by an individual not employed by the Associated Press and obtained by the AP outside Iran shows a pro-government Iranian man holding a poster of the late revolutionary founder Ayatollah Khomeini, on the main gate of the Tehran University campus in Tehran, Iran, Monday, Dec. 7, 2009. Some 2,000 Basiji students were brought into Tehran University early Monday _ ostensibly to hold a celebration for the Shiite holiday, but such hard-line students are often used to crush pro-reform rallies on campus. Pro-reform campus groups have called for students across the country to turn out Monday for massive rallies at universities against Iran's clerical leadership _ the first major protest in more than a month.
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