Katie Hoff (R) receives interview at the awarding ceremony for the Women's 400m Individual Medley at the U.S. Olympic Swimming Trials in Omaha of the United States, June 29, 2008.(Xinhua Photo)

Michael Phelps (R) celebrates after he broke world record during the Men's 400m Individual Medley at the U.S. Olympic Swimming Trials in Omaha of the United States, June 29, 2008.(Xinhua Photo)

(Xinhua News Agency June 30, 2008)