United States' Michael Phelps touches the wall as South Africa's Chad le Clos closes in for second place during the men's 100-meter butterfly final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Friday, Aug. 3, 2012. (AP Photo/Mark J. Terrill)

United States' Missy Franklin competes in the women's 200-meter backstroke final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Friday, Aug. 3, 2012. Franklin won the gold.(AP Photo/Julio Cortez)

Spain's Onan Barreiros and Aaron Sarmiento practice before starting the 470 men class race at the London 2012 Summer Olympics, Friday, Aug. 3, 2012, in Weymouth and Portland, England. (AP Photo/Bernat Armangue)

Ethiopia's Tirunesh Dibaba reacts after winning gold in the women's 10,000-meter final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 3, 2012. (AP Photo/Martin Meissner)

Poland's Tomasz Majewski celebrates winning the gold for the men's shot put during the athletics competition in the Olympic Stadium at the 2012 Summer Olympics, Friday, Aug. 3, 2012, in London. (AP Photo/David J. Phillip)

France's Florent Manaudou reacts to his gold medal win in the men's 50-meter freestyle swimming final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Friday, Aug. 3, 2012. (AP Photo/Michael Sohn)

United States' Missy Franklin starts in the women's 200-meter backstroke final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Friday, Aug. 3, 2012. Franklin won a gold medal in the event. (AP Photo/Michael Sohn)

Judges watch the trampoline performance of gold medallist Dong Dong of China at the 2012 Summer Olympics, Friday, Aug. 3, 2012, in London. (AP Photo/Julie Jacobson)

France's Gael Prevost shoots during the men's individual archery competition at the 2012 Summer Olympics, Friday, Aug. 3, 2012, in London. (AP Photo/Marcio Jose Sanchez)

Rains drops collect on the window of a judge's booth as Richard Davison, of Great Britain, rides his horse Artemis, in the equestrian dressage competition at the 2012 Summer Olympics, Friday, Aug. 3, 2012, in London. (AP Photo/David Goldman)

In this photo taken with a fisheye lens Ukraine's Hanna Demydova makes an attempt in the women's Triple Jump qualification during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 3, 2012. (AP Photo/David J. Phillip )

Lidia Valentin Perez of Spain competes during the women's 75-kg, group A, weightlifting competition at the 2012 Summer Olympics, Friday, Aug. 3, 2012, in London. (AP Photo/Hassan Ammar)

France's Teddy Riner kisses his gold medal for the men's over 100-kg judo competition at the 2012 Summer Olympics, Friday, Aug. 3, 2012, in London. (AP Photo/Paul Sancya)

Cuba's Rafael Silva Hungary's Barna Bor compete during the men's over 100-kg judo competition at the 2012 Summer Olympics, Friday, Aug. 3, 2012, in London. (AP Photo/Paul Sancya)

New Zealand's Hamish Bond, left, and Eric Murray celebrate after winning the gold medal for the men's rowing pair in Eton Dorney, near Windsor, England, at the 2012 Summer Olympics, Friday, Aug. 3, 2012. (AP Photo/Chris Carlson)

Britain's Jessica Ennis smiles after winning her 100-meter hurdles heat of the Women's Heptathlon during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 3, 2012. (AP Photo/Anja Niedringhaus)

Reese Hoffa of the United States prepares for an attempt in the men's shot put qualification during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 3, 2012. (AP Photo/David J. Phillip )