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Pittsburgh Steelers v Baltimore Ravens

BALTIMORE, MD - SEPTEMBER 11: Baltimore Ravens fans poses with a sign commemorating the 10th anniversary of the September 11, 2001 terrorist attacks before the start of the season opener between Baltimore Ravens and Pittsburgh Steelers game at M&T Bank Stadium on September 11, 2011 in Baltimore, Maryland. (Photo by Rob Carr/Getty Images)

9/11 sports tributes

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