General view of the Beach Volleyball venue at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Petr David Josek)

Rigoberto Uran of Colombia crosses the finish line to win the silver medal in the Men's Road Cycling race at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. Alexander Vinokourov of Kazakhstan won th gold medal and Alexander Kristoff of Norway claimed the bronze. (AP Photo/Christophe Ena)

China's Wang Mingjuan reacts during the women's 48-kg weightlifting event where she won the gold medal at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Mike Groll)

Italy's Elisa Di Francisca reacts after defeating Korea's Nam Hyun Hee during a semifinal fencing match at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Dmitry Lovetsky)

Valentina Vezzali of Italy reacts to winning her round of 16 match against Ines Boubakri of Tunisa during women's fencing at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Andrew Medichini)

Camilla Dalby of Denmark, 2nd right, celebrates with team mate Line Jorgensen after winning their women's handball preliminary match against Sweden at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Matthias Schrader)

In this multiple exposure photo, U.S. gymnast Danell Leyva performs on the floor at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Julie Jacobson)

Croatia guard Iva Ciglar battles for a loose ball against the United States during a basketball game at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Charles Krupa)

Italy's gymnast Matteo Morandi performs on the rings during the Artistic Gymnastics men's qualification at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Matt Dunham)

Italy's gymnast Matteo Angioletti performs on the rings during the Artistic Gymnastics men's qualification at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Matt Dunham)

Gwang-Hyeon Choi of the Republic of Korea flips Felipe Kitadai of Brazil during the semifinal round of the men's 60kg judo competition at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Paul Sancya)

Russia's Valeria Sorokina, left, and teammate Alexandr Nikolaenko celebrate after beating Britain's Chris Adcock and Imogen Bankier in a mixed doubles badminton match at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Andres Leighton)

Japan's Reiko Shiota serves during a mixed doubles badminton match of the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Saurabh Das)

Boats pass the grandstand during a lightweight men's rowing four heat in Eton Dorney, near Windsor, England, at the 2012 Summer Olympics, Saturday, July 28, 2012. (AP Photo/Natacha Pisarenko)

USA's Michael Phelps competes in a heat of the men's 400-meter individual medley at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Michael Sohn)

USA's Michael Phelps competes in a heat of the men's 400-meter individual medley at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Saturday, July 28, 2012. (AP Photo/David J. Phillip)

The Olympic cauldron is lit during the Opening Ceremony at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Paul Sancya)