Bianca Knight, Carmelita Jeter, Marshevet Myers and Allyson Felix of United States celebrate with their country's flag in front of photographers after claiming gold in the women's 4x100 metres relay final during day nine of 13th IAAF World Athletics Championships at Daegu Stadium on September 4, 2011 in Daegu, South Korea.
(September 3, 2011 - Source: Mark Dadswell/Getty Images AsiaPac)