Britain's Thomas Daley and Peter Waterfield embrace after a dive in the men's synchronised 10m platform final diving event at the London 2012 Olympic Games at the Olympic Park in London on July 30, 2012. The British pair finished fourth. AFP PHOTO / CHRISTOPHE SIMON
Canadian cyclist Tara Whitten reacts after a fourth-place finish, during the Omnium cycling event at the London 2012 Olympic games. Tuesday, August 7, 2012 AL CHAREST/CALGARY SUN/QMI AGENCY
REFILE - UPDATING CAPTION WITH RESULT OF EVENT China's Zhang Wenxiu smiles as she celebrates with her national flag after initially winning the bronze medal in the women's hammer throw final at the London 2012 Olympic Games at the Olympic Stadium August 10, 2012. Zhang was later placed fourth in the event after a referee's decision change gave Germany's Betty Heidler the bronze. REUTERS/Kai Pfaffenbach (BRITAIN - Tags: OLYMPICS SPORT ATHLETICS)
Wallace Spearmon of the U.S. wears his country's flag after finishing fourth in the men's 200m final at the London 2012 Olympic Games in London August 9, 2012. REUTERS/Stefano Rellandini (BRITAIN - Tags: OLYMPICS SPORT ATHLETICS)
Fourth placed Britain's Keri-anne Payne acknowledges the crowd after the women's 10km marathon at the London Olympic Games August 9, 2012. REUTERS/Stefan Wermuth (BRITAIN - Tags: OLYMPICS SPORT SWIMMING)
Fourth placed Britain's Keri-anne Payne acknowledges the crowd after the women's 10km marathon at the London Olympic Games August 9, 2012. REUTERS/Dominic Ebenbichler (BRITAIN - Tags: OLYMPICS SPORT SWIMMING)
Canada's synchronised swimming team compete in the team free routine final during the synchronised swimming competition at the London 2012 Olympic Games on August 10, 2012 in London. AFP PHOTO / FABRICE COFFRINI
Britain's David Greene reacts after finishing fourth in the men's 400m hurdles final at the athletics event of the London 2012 Olympic Games on August 6, 2012 in London. AFP PHOTO / FRANCK FIFE
Britain's Thomas Daley and Peter Waterfield (top) compete in the men's synchronised 10m platform final diving event at the London 2012 Olympic Games at the Olympic Park in London on July 30, 2012. The British pair finished fourth. AFP PHOTO / LEON NEAL
Germany's Patrick Hausding performs a dive during the men's 3m springboard final at the London 2012 Olympic Games at the Aquatics Centre August 7, 2012. Hausding finished in fourth place in the event. REUTERS/Toby Melville
France's David Hauss runs to finish fourth in the men's triathlon final during the London 2012 Olympic Games at Hyde Park August 7, 2012. REUTERS/Tim Wimborne
Tyson Gay of the U.S. reacts after finishing fourth in the men's 100m final during the London 2012 Olympic Games at the Olympic Stadium August 5, 2012. REUTERS/Dylan Martinez
Argentina's Ariel Suarez (back) and Cristian Rosso react after the men's double sculls finals rowing event during the London 2012 Olympic Games at Eton Dorney August 2, 2012. The team finished fourth in the race. REUTERS/Darren Whiteside
Third-placed Ukraine's Olena Kostevych (facing camera) hugs fourth-placed Russia's Zorana Arunovic after the women's 25m pistol shooting final at the London 2012 Olympic Games at the Royal Artillery Barracks August 1, 2012. REUTERS/Mike Hutchings
Michael Phelps of the U.S. reacts after a fourth place finish in the men's 400m individual medley final during the London 2012 Olympic Games at the Aquatics Centre July 28, 2012. REUTERS/David Gray (BRITAIN - Tags: SPORT OLYMPICS SPORT SWIMMING TPX IMAGES OF THE DAY)
World champion Russia's Alexei Klimov gestures as he competes in the 25m rapid fire pistol men final at the London 2012 at the Royal Artillery Barracks in London, August 3, 2012. Klimov finished in the fourth place despite having shot a perfect score of 600 in the qualifying round as Cuba's Leuris Pupo gave his country's the first gold medal in the games. AFP PHOTO / MARWAN NAAMANI
France's Camille Lacourt reacts after finishing fourth in the men's 100m backstroke final swimming event at the London 2012 Olympic Games on July 30, 2012 in London. AFP PHOTO / CHRISTOPHE SIMON
Britain's Thomas Daley and Peter Waterfield react at the end of the men's synchronised 10m platform final diving event at the London 2012 Olympic Games at the Olympic Park in London on July 30, 2012. The British pair came fourth. AFP PHOTO / CHRISTOPHE SIMON