Julie Zetlin of the United States competes in the Individual All-Around Gymnastics Rhythmic on Day 13 of the London 2012 Olympics Games at Wembley Arena on August 9, 2012 in London, England.

Christopher Ciriello of Australia and Christopher Zeller of Germany challenge for the ball during the Men's Hockey semifinal match on Day 13 of the 2012 Olympic Games at Riverbank Arena Hockey Centre Aug. 9, 2012 in London, England.

Guzel Manyurova of Kazakhstan (red) and Natalia Vorobeva of Russia compete in the Women's Freestyle 72 kg Wrestling on Day 13 of the London 2012 Olympic Games at ExCeL on August 9, 2012 in London, England.

The field clear a jump during the Men's BMX Cycling Quarter Finals on Day 13 of the London 2012 Olympic Games at BMX Track on August 9, 2012 in London, England.

Australia compete in the Women's Teams Synchronised Swimming Technical Routine on Day 13 of the London 2012 Olympic Games at the Aquatics Centre on August 9, 2012 in London, England.

Foluke Akinradewo #16 of United States reacts after a point in the third set against Korea during the Women's Volleyball semifinal match on Day 13 of the London 2012 Olympics Games at Earls Court on August 9, 2012 in London, England.

Martin Stamper of Great Britain competes against Damir Fejzic of Serbia during the Men's -68kg Taekwondo quarterfinal match on Day 13 of the London 2012 Olympic Games at ExCeL on August 9, 2012 in London, England.

(L-R) Jelle Van Gorkom of Netherlands, Maik Baier of Germany, and Tory Nyhaug of Canada crash during the Men's BMX Cycling Quarter Finals on Day 13 of the London 2012 Olympic Games at BMX Track Aug. 9, 2012 in London, England.

Detail of the back of Cecilia Biagioli of Argentina after the Women's Marathon 10km Swimming at Hyde Park on August 9, 2012 in London, England.

Hyang Kim Un of Korea competes in the Women's 10m Platform Diving Semifinal on Day 13 of the London 2012 Olympic Games at the Aquatics Centre on August 9, 2012 in London, England.

Adam Pretty

Swans are seen in Serpentine Lake before the Women's Marathon 10km Swimming at Hyde Park on August 9, 2012 in London, England. (Photo by Ryan Pierse/Getty Images)

Sandrine Soubeyrand #6 of France handles the ball against Melissa Tancredi #14 of Canada during the Women's Football bronze medal match on Day 13 of the 2012 Olympic Games at City of Coventry Stadium Aug. 9, 2012 in Coventry, England.

Elodie Thomis #12 of France handles the ball against Lauren Sesselmann #10 of Canada during the Women's Football bronze medal match on Day 13 of the London 2012 Olympic Games at City of Coventry Stadium on August 9, 2012 in Coventry, England.

Jamie Squire

Angela Maurer of Germany and Erika Villaecija Garcia of Spain dive into the water to start the Women's Marathon 10km Swimming at Hyde Park on August 9, 2012 in London, England.

Clive Rose

Vita Styopina of Ukraine competes during the Women's High Jump qualification on Day 13 of the London 2012 Olympic Games at Olympic Stadium on August 9, 2012 in London, England.

Stu Forster

Oleksiy Kasyanov of Ukraine competes during the Men's Decathlon Discus Throw on Day 13 of the London 2012 Olympic Games at Olympic Stadium on August 9, 2012 in London, England.

Pawel Kopczynski

Baton handover from 2nd to 3rd leg during the Men's 4 x 400m Relay Round 1 heats on Day 13 of the London 2012 Olympic Games at Olympic Stadium on August 9, 2012 in London, England.

Rob Carr

Ashton Eaton of the United States competes during the Men's Decathlon 110m Hurdles heats on Day 13 of the London 2012 Olympic Games at Olympic Stadium on August 9, 2012 in London, England.

Feng Li

Ariane Friedrich of Germany reacts during the Women's High Jump qualification on Day 13 of the London 2012 Olympic Games at Olympic Stadium on August 9, 2012 in London, England.

Stu Forster

Ali Sue Bernard of the United States (red) and Anna Jenny Fransson of Sweden compete in the Women's Freestyle 72 kg Wrestling on Day 13 of the London 2012 Olympic Games at ExCeL on August 9, 2012 in London, England.

Quinn Rooney