Brazilian soccer star Pele displays the FIFA World Cup during its presentation in Rio de Janeiro in February 2010. Pele's World Cup winner's medals from 1958, 1962 and 1970 are up for auction. AFP/Getty Images hide caption

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Liverpool supporters were crushed against a barrier in 1989, in what became Britian's worst sports disaster. Some 96 fans died in the incident at the Hillsborough Stadium in Sheffield, England. David Cannon/Getty Images hide caption

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United States players celebrate a goal against Guatemala during the second half of a World Cup qualifying soccer match Tuesday in Columbus, Ohio. The United States beat Guatemala 4-0. Jay LaPrete/AP hide caption

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Futbol Club Barcelona's Neymar da Silva Santos pours champagne over Adriano as their team won the final match against River Plate at the FIFA Club World Cup soccer tournament in Yokohama, near Tokyo, on Dec. 20. Shuji Kajiyama/AP hide caption

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Soccer, The Normal-Sized Player's Game

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U.S. forward Abby Wambach waves to fans at the end of a practice session Tuesday in New Orleans for Wednesday's final U.S. victory tour match, against China. Wambach will be playing in her final match with the team. Gerald Herbert/AP hide caption

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Abby Wambach of the U.S. women's national soccer team (right) stands with teammates during a practice in October. The team canceled a friendly match against Trinidad and Tobago on Sunday because of the poor state of the artificial turf. Elaine Thompson/AP hide caption

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Children on Staten Island, N.Y., playing soccer. U.S. Soccer says it strongly urges all youth leagues around the country to follow the guidelines. Hilton Flores/Staten Island Advance/Landov hide caption

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