CHICAGO, IL – OCTOBER 09: Thousands of runners participate in the Bank of America Chicago Marathon on October 9, 2011 in Chicago, Illinois. (Photo by Tasos Katopodis/Getty Images)
CHICAGO, IL – OCTOBER 09: Thousands of runners participate in the Bank of America Chicago Marathon on October 9, 2011 in Chicago, Illinois. (Photo by Tasos Katopodis/Getty Images)