Top U.S. swimmer Michaael Phelps(C) and Katie Hoff (R) send a special swimming cap to Zhou Wenzhong, Chinese ambassador to the United States, at a Fund-raising event held at the North Baltimor Aquatic Center in Baltimore, Maryland, the United States of America, May 10, 2008. The swimming cap is printed with words "Beijing 2008" and "NEAC" which stands for the North Baltimor Aquatic Center. (Xinhua/Zhang Yan)
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Top U.S. swimmer Michaael Phelps(L) and Katie Hoff attend a press conference during a Fund-raising event held at the North Baltimor Aquatic Center in Baltimore, Maryland, the United States of America, May 10, 2008. (Xinhua/Zhang Yan) 
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Top U.S. swimmer Michaael Phelps(R) and Katie Hoff were seen during a Fund-raising event held at the North Baltimor Aquatic Center in Baltimore, Maryland, the United States of America, May 10, 2008. (Xinhua/Zhang Yan)
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