9/11 sports tributes

Associated Press
First responders hold an American flag before an NFL football game between the Buffalo Bills and Kansas City Chiefs at Arrowhead Stadium, Sunday, Sept. 11, 2011, in Kansas City, Mo. The day marks the 10th anniversary of the 9/11 attacks. (AP Photo/Orlin Wagner)

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The sports world paid tribute to the 10th anniversary of the 9/11 attacks.

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