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Missy Franklin of the United States smiles as she holds the gold medal she won in the Women's 200m backstroke final at the FINA Swimming World Championships in Barcelona, Spain, Saturday, Aug. 3, 2013. (AP Photo/Daniel Ochoa de Olza) ( Spain Swimming Worlds )

Denmark's Jeanette Ottesen Gray, right, stretches to finish and win the gold medal in the Women's 50m butterfly final ahead of The Netherlands' Ranomi Kromowidjojo, left, at the FINA Swimming World Championships in Barcelona, Spain, Saturday, Aug. 3, 2013. (AP Photo/David J. Phillip) ( APTOPIX Spain Swimming Worlds )

BARCELONA, SPAIN - AUGUST 03: Missy Franklin of the USA competes during the Swimming Women's Backstroke 200m Final on day fifteen of the 15th FINA World Championships at Palau Sant Jordi on August 3, 2013 in Barcelona, Spain. (Photo by Alexander Hassenstein/Getty Images) ( 175458347 )

BARCELONA, SPAIN - AUGUST 03: Missy Franklin of the USA competes during the Swimming Women's Backstroke 200m Final on day fifteen of the 15th FINA World Championships at Palau Sant Jordi on August 3, 2013 in Barcelona, Spain. (Photo by Alexander Hassenstein/Getty Images) ( 175458348 )

Australia's Bronte Campbell (R) and Australia's Cate Campbell react after the semi-finals of the men's 50-metre freestyle swimming event in the FINA World Championships at Palau Sant Jordi in Barcelona on August 3, 2013. LLUIS GENE/AFP/Getty Images ( 521854523 )

Missy Franklin of the U.S. laughs as she poses with her gold medal at the the women's 200m backstroke victory ceremony during the World Swimming Championships at the Sant Jordi arena in Barcelona August 3, 2013. REUTERS/Albert Gea ( SWIMMING-WORLD/ )

Gold medallist Missy Franklin of the U.S. (C) poses with other medallists at the the women's 200m backstroke victory ceremony during the World Swimming Championships at the Sant Jordi arena in Barcelona August 3, 2013. Australia's Belinda Hocking (L) finished second in the event and took the silver medal, while Canada's Hilary Caldwell finished third and took the bronze. REUTERS/Albert Gea ( SWIMMING-WORLD/ )

BARCELONA, SPAIN - AUGUST 03: A detail shot of the painted toenails of Missy Franklin of the USA as she waits on the podium after the Swimming Women's Backstroke 200m Final on day fifteen of the 15th FINA World Championships at Palau Sant Jordi on August 3, 2013 in Barcelona, Spain. (Photo by Alexander Hassenstein/Getty Images) ( 175382722 )

Lithuania's Ruta Meilutyte reacts after winning a Women's 50m breaststroke semifinal in a new world record time of 29.48 at the FINA Swimming World Championships in Barcelona, Spain, Saturday, Aug. 3, 2013. (AP Photo/Michael Sohn) ( Spain Swimming Worlds )

Katie Ledecky of the U.S. swims to win the women's 800m freestyle final during the World Swimming Championships at the Sant Jordi arena in Barcelona August 3, 2013. The 16-year-old clocked a time of eight minutes 13.86 seconds to set a world record to win the event on Saturday and complete a rare treble of distance titles. REUTERS/Albert Gea ( SWIMMING-WORLD/ )

South Africa's Chad Le Clos celebrates after winning the gold medal in the Men's 100m butterfly final at the FINA Swimming World Championships in Barcelona, Spain, Saturday, Aug. 3, 2013. (AP Photo/Daniel Ochoa de Olza) ( APTOPIX Spain Swimming Worlds )

Lithuania's Ruta Meilutyte, right, swims to win a Women's 50m breaststroke semifinal in a new world record time of 29.48 at the FINA Swimming World Championships in Barcelona, Spain, Saturday, Aug. 3, 2013. (AP Photo/David J. Phillip) ( APTOPIX Spain Swimming Worlds )

BARCELONA, SPAIN - AUGUST 03: Frederick Bousquet of France prepares to compete in the Swimming Men's Freestyle 50m Final on day fifteen of the 15th FINA World Championships at Palau Sant Jordi on August 3, 2013 in Barcelona, Spain. (Photo by Alexander Hassenstein/Getty Images) ( 175461451 )

Katie Ledecky of the United States reacts after winning the gold medal in the Women's 800m freestyle final at the FINA Swimming World Championships in Barcelona, Spain, Saturday, Aug. 3, 2013. Ledecky won in a new world record time of 8:13.86. (AP Photo/Daniel Ochoa de Olza) ( APTOPIX Spain Swimming Worlds )

Katie Ledecky of the U.S. smiles after winning the women's 800m freestyle final during the World Swimming Championships at the Sant Jordi arena in Barcelona August 3, 2013. The 16-year-old clocked a time of eight minutes 13.86 seconds to set a world record to win the event on Saturday and complete a rare treble of distance titles. REUTERS/Albert Gea ( SWIMMING-WORLD/ )

Brazil's Cesar Cielo Filho celebrates after winning the final of the men's 50-metre freestyle swimming event in the FINA World Championships at Palau Sant Jordi in Barcelona on August 3, 2013. FRANCOIS XAVIER MARIT/AFP/Getty Images ( 521854228 )

BARCELONA, SPAIN - AUGUST 03: Ryan Lochte of the USA competes during the Swimming Men's Butterfly 100m Final on day fifteen of the 15th FINA World Championships at Palau Sant Jordi on August 3, 2013 in Barcelona, Spain. (Photo by Alexander Hassenstein/Getty Images) ( 175457698 )

South Africa's Chad Le Clos poses with his gold medal at the men's 100m butterfly victory ceremony during the World Swimming Championships at the Sant Jordi arena in Barcelona August 3, 2013. REUTERS/Albert Gea ( SWIMMING-WORLD/ )

Brazil's Cesar Cielo Filho wipes away tears after receiving his gold medal during the presentation ceremony for the Men's 50m freestyle final at the FINA Swimming World Championships in Barcelona, Spain, Saturday, Aug. 3, 2013. (AP Photo/Daniel Ochoa de Olza) ( APTOPIX Spain Swimming Worlds )

US swimmer Dana Vollmer (C) and Britain's Francesca Halsall (bottom) compete in the final of the women's 50-metre butterfly swimming event in the FINA World Championships at Palau Sant Jordi in Barcelona on August 3, 2013. JOSEP LAGO/AFP/Getty Images ( 521854290 )

BARCELONA, SPAIN - AUGUST 03: Ruta Meilutyte of Lithuania sets a new World Record time of 29.48 in the Swimming Women's Breaststroke 50m Semifinal heat 2 on day fifteen of the 15th FINA World Championships at Palau Sant Jordi on August 3, 2013 in Barcelona, Spain. (Photo by Adam Pretty/Getty Images) ( 175458337 )

Russia's Yuliya Efimova, right, celebrates with Ukraine's Mariia Liver after winning her Women's 50m breaststroke heat in a new world record time of 29.78 at the FINA Swimming World Championships in Barcelona, Spain, Saturday, Aug. 3, 2013. (AP Photo/Daniel Ochoa de Olza) ( APTOPIX Spain Swimming Worlds )

Lithuania's Ruta Meilutyte celebrates after breaking the women's 50-metre breaststroke world record during the semi-finals of the women's 50-metre breaststroke swimming event in the FINA World Championships at Palau Sant Jordi in Barcelona on August 3, 2013. FABRICE COFFRINI/AFP/Getty Images ( 521854343 )

Russia's Evgeny Korotyshkin (top) competes in the final of the men's 100-metre butterfly swimming event in the FINA World Championships at Palau Sant Jordi in Barcelona on August 3, 2013. Korotyshkin took third place of the event. JOSEP LAGO/AFP/Getty Images ( 521854831 )

BARCELONA, SPAIN - AUGUST 03: Katie Ledecky of the USA sets a new World Record time of 8:13.86 in the Swimming Women's Freestyle 800m Final on day fifteen of the 15th FINA World Championships at Palau Sant Jordi on August 3, 2013 in Barcelona, Spain. (Photo by Alexander Hassenstein/Getty Images) ( 175458326 )

BARCELONA, SPAIN - AUGUST 03: Katie Ledecky of the USA (C) sets a new World Record time of 8:13.86 alongside Lotte Friis (L) of Denmark and Lauren Boyle (R) of New Zealand in the Swimming Women's Freestyle 800m Final on day fifteen of the 15th FINA World Championships at Palau Sant Jordi on August 3, 2013 in Barcelona, Spain. (Photo by Clive Rose/Getty Images) ( 175451948 )

Competitors dive in to start a Men's 1500m freestyle heat at the FINA Swimming World Championships in Barcelona, Spain, Saturday, Aug. 3, 2013. (AP Photo/Daniel Ochoa de Olza) ( APTOPIX Spain Swimming Worlds )

BARCELONA, SPAIN - AUGUST 03: A general view as athletes compete in the Swimming Men's Butterfly 100m Final on day fifteen of the 15th FINA World Championships at Palau Sant Jordi on August 3, 2013 in Barcelona, Spain. (Photo by Adam Pretty/Getty Images) ( 175462031 )

BARCELONA, SPAIN - AUGUST 03: Missy Franklin of the USA competes during the Swimming Women's Backstroke 200m Final on day fifteen of the 15th FINA World Championships at Palau Sant Jordi on August 3, 2013 in Barcelona, Spain. (Photo by Clive Rose/Getty Images) ( 175461988 )

BARCELONA, SPAIN - AUGUST 03: A general view of action during the Swimming Men's 5th-6th Place Match between Greece and Spain on day fifteen of the 15th FINA World Championships at Piscines Bernat Picornell on August 3, 2013 in Barcelona, Spain. (Photo by Al Bello/Getty Images) ( 175458659 )

Montenegro's Aleksandar Ivovic, lower center, takes a shot as Hungary¥s Norbert Madaras, left, and Norbert Hosnyansky, right, defend during the Men's water polo final at the FINA Swimming World Championships in Barcelona, Spain, Saturday, Aug. 3, 2013 .(AP Photo/Manu Fernandez) ( Spain Swimming Worlds )

Hungary's team celebrate with the trophy after winning against Montenegro at their men's water polo gold medal match during the World Swimming Championships at the Piscines Bernat Picornell in Barcelona August 3, 2013. REUTERS/Michael Dalder ( SWIMMING-WORLD/ )

BARCELONA, SPAIN - AUGUST 03: Viktor Nagy of Hungary in action during the Men's Water Polo Men's Gold Medal Match between Hungary and Montenegro on day fifteen of the 15th FINA World Championships at Piscines Bernat Picornell on August 3, 2013 in Barcelona, Spain. (Photo by Al Bello/Getty Images) ( 175463706 )

Hungary's players coaches celebrate their victory over Montenegro in the Men's water polo final at the FINA Swimming World Championships in Barcelona, Spain, Saturday, Aug. 3, 2013 .(AP Photo/Manu Fernandez) ( Spain Swimming Worlds )