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Buffalo Bills v Kansas City Chiefs

KANSAS CITY, MO - SEPTEMBER 11: A giant flag is unrolled during the National Anthem to commemorate the 10th anniversary of September 11th prior to the start of the game between the Buffalo Bills and the Kansas City Chiefs at Arrowhead Stadium on September 11, 2011 in Kansas City, Missouri. (Photo by Jamie Squire/Getty Images)

9/11 sports tributes

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