The United States' Claressa Shields, in red, fights Russia's Nadezda Torlopova, in blue, in a women's middleweight 75-kg boxing gold medal match at the 2012 Summer Olympics, Thursday, Aug. 9, 2012, in London. – Photo by AP

United States goalkeeper Hope Solo shows her gold medal after a gold medal match against Japan at the 2012 Summer Olympics, Thursday, Aug. 9, 2012, in London. he U.S. women's football team won its third straight Olympic gold medal Thursday, beating Japan 2-1 in a rematch of last year's World Cup final and avenging the most painful loss in its history. – Photo by AP

South Africa's Oscar Pistorius reacts after fellow team members crashed out of a men's 4x400-meter relay heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Thursday, Aug. 9, 2012. – Photo by AP

Argentina's forward Federico Kammerichs, right, challenges United States' forward Carmelo Anthony during a men's semifinal basketball game at the 2012 Summer Olympics on Friday, Aug. 10, 2012, in London. – Photo by AP

The Netherlands' players hold their national flags as they celebrate following their 2-0 win over Argentina in the women's field hockey gold medal match at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. – Photo by AP

Spain's Nicolas Garcia Hemme fights Argentina's Sebastian Eduardo Crismanich (in red) during the gold medal match in men's 80-kg taekwondo competition at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. – Photo by AP

Russia's Tatyana Lysenko takes a throw in the women's hammer throw final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. – Photo by AP

United States' Morgan Uceny reacts after falling during the women's 1500-meter final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. – Photo by AP

France's centreback Nikola Karabatic tries to score during the men's semi-final handball match France vs Croatia for the London 2012 Olympics Games on August 10, 2012 at the Basketball Arena in London. France won 25-21. – Photo by AFP

Germany's Bjorn Otto competes to win bronze in the men's pole vault final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. – Photo by AP

Bahamas' men's 4x400-meter relay team members Chris Brown, left, Michael Mathieu, Demetrius Pinder, and Ramon Miller celebrate their victory during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. – Photo by AP

USA's Bryshon Nellum, Joshua Mance, Tony McQuay and Angelo Taylor celebrate their silver medal in the men's 4x400-meter during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. – Photo by AP