Junior Seau sustained many concussions during his career and was suffering from a degenerative brain disease when he killed himself in May 2012. Otto Greule Jr./Getty Images hide caption

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Venus Williams waves to tennis fans as she leaves the court after a three-hour loss to Zheng Jie of China in the U.S. Open's second round. Don Emmert/AFP/Getty Images hide caption

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A gay-rights activist chants slogans during a demonstration in front of the Russian Consulate in New York on July 31. Gays in the United States and elsewhere are outraged by Russia's intensifying campaign against gay-rights activism. Mary Altaffer/AP hide caption

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Attorney Robert Allard, seen here with former swimmer Jancy Thompson in 2010, says USA Swimming still needs to improve its handling of sexual abuse claims. The organization is also facing congressional scrutiny. Ben Margot/AP hide caption

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Venus Williams hits a forehand during her first-round win over Kirsten Flipkens of Belgium Monday. Matthew Stockman/Getty Images hide caption

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