US swimmer Michael Phelps (C) greets family members after the men's 4 x 100m medley relay swimming final medal ceremony at the National Aquatics Center during the 2008 Beijing Olympic Games in Beijing on August 17, 2008. Michael Phelps became the first man to win eight gold medals at the same Olympics when the US won the men's 4x100m medley relay final in a new world record time. [Xinhua]