Katie Ledecky of the USA celebrates as she sets a new World Record time of 15:36.53 during the Swimming Women's 1500m Freestyle Final on day eleven of the 15th FINA World Championships at Palau Sant Jordi on July 30, 2013 in Barcelona, Spain.
London 2012 Olympics: in pictures July 25 - Ticker tape: Jose Manuel Calderon of the Spainish basketball team looks toward the sideline at the end of a exhibition game between US and Spain at Palau Sant Jordi in Barcelona Picture: GETTY IMAGES
Team USA vs. Spain - U.S. U.S. Olympic basketball player Carmelo Anthony (L) challenges Spain's Serge Ibaka during an exhibition game ahead of the 2012 London Olympic Games at Palau Sant Jordi in Barcelona July 24, 2012. REUTERS/Gustau Nacarino (SPAIN - Tags: SPORT BASKETBALL OLYMPICS)
Pau Gasol stretches during a training session of the Spanish basketball team ahead of the London 2012 Olympic Games, at Palau Sant Jordi in Barcelona. GUSTAU NACARINO/REUTERS
US Men's Senior National Team in Pre-Olympic Men's Exhibition Game between USA and Argentina at Palau Sant Jordi, on July 22, 2012 in Barcelona, Spain.
2012 Olympic Games - Opening Ceremony. The Marshall Islands team.
Carmelo Anthony (L) of Team USA fights for a ball against Federico Kammerichs of Team Argentina during their men's exhibition basketball game ahead of the London 2012 Olympic Games at Palau Sant Jordi arena, in Barcelona July 22, 2012.