Leroy Dixon (R) of the U.S. celebrates as he edges Jamaica's Asafa Powell (2nd R), Brazil's Sandro Viana (2nd L) and Britain's Mark Lewis-Francis (L) at the finish line to win the men's 4x100 metres relay at the 11th IAAF World Athletics Championships in Osaka, September 1, 2007. REUTERS/Michael Dalder (JAPAN)