Britain's Prince Harry hits the ball to former U.S. Olympic beach volleyball player Misty May-Treanor (L) as they play sitting volleyball with members of the British Warrior Games team in a gymnasium, before the opening of the Warrior Games at the U.S. Olympic Training Center in Colorado Springs, Colorado May 11, 2013. The Warrior Games is a Paralympic-style competition featuring injured servicemen and women from the U.S., United Kingdom, Canada and Australia. REUTERS/Rick Wilking (UNITED STATES - Tags: MILITARY POLITICS ROYALS SPORT VOLLEYBALL TPX IMAGES OF THE DAY) 

Silver medallists April Ross (L) of the U.S. and team mate Jennifer Kessy, gold medallists Misty May-Treanor of the U.S. and team mate Kerri Walsh Jennings (3rd R) and bronze medallists Brazil's Larissa and Juliana (R) pose with their medals at the women's beach volleyball victory ceremony at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Gold medallists Misty May-Treanor of the U.S. and team mate Kerri Walsh Jennings (R) listen to their national anthem as they celebrate at the women's beach volleyball victory ceremony at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Gold medallists Misty May-Treanor of the U.S. and team mate Kerri Walsh Jennings (R) celebrate with their medals at the women's beach volleyball victory ceremony at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Gold medallists Misty May-Treanor of the U.S. and team mate Kerri Walsh Jennings (R) celebrate with their medals at the women's beach volleyball victory ceremony at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Gold medallists Misty May-Treanor of the U.S. and team mate Kerri Walsh Jennings (R) celebrate with their medals at the women's beach volleyball victory ceremony at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL TPX IMAGES OF THE DAY)

Gold medallists Misty May-Treanor of the U.S. and team mate Kerri Walsh Jennings (R) celebrate with their medals at the women's beach volleyball victory ceremony at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Gold medallists Misty May-Treanor of the U.S. and team mate Kerri Walsh Jennings (R) celebrate with their medals at the women's beach volleyball victory ceremony at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Dominic Ebenbichler (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Gold medallists Misty May-Treanor of the U.S. and team mate Kerri Walsh Jennings (R) pose with their medals at the women's beach volleyball victory ceremony at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Dominic Ebenbichler (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Gold medallists Misty May-Treanor of the U.S. and team mate Kerri Walsh Jennings (R) pose with their medals at the women's beach volleyball victory ceremony at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Dominic Ebenbichler (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. (2nd R) and team mate Kerri Walsh Jennings (R) greet compatriots April Ross and Jennifer Kessy (L) before their women's beach volleyball gold medal match at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. and team mate Kerri Walsh Jennings (2nd R) hug compatriots April Ross and Jennifer Kessy as they celebrate winning the women's beach volleyball gold medal match at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. and team mate Kerri Walsh Jennings celebrate winning the women's beach volleyball gold medal match at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL TPX IMAGES OF THE DAY)

Misty May-Treanor of the U.S. and team mate Kerri Walsh Jennings (L) celebrate winning the women's beach volleyball gold medal match at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. and team mate Kerri Walsh Jennings (R) celebrate winning the women's beach volleyball gold medal match at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. and team mate Kerri Walsh Jennings (L) celebrate winning the women's beach volleyball gold medal match with their families at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. and team mate Kerri Walsh Jennings celebrate winning the women's beach volleyball gold medal match with their families at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. celebrates with dancers after winning the women's beach volleyball gold medal match at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. celebrates with dancers after winning the women's beach volleyball gold medal match at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. celebrates winning the women's beach volleyball gold medal match at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. celebrates winning the women's beach volleyball gold medal match at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. and team mate Kerri Walsh Jennings (R) hug compatriots April Ross and Jennifer Kessy as they celebrate winning the women's beach volleyball gold medal match at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Dominic Ebenbichler (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. celebrates winning the women's beach volleyball gold medal match at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. and team mate Kerri Walsh Jennings (R) celebrate winning the women's beach volleyball gold medal match at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Dominic Ebenbichler (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. and team mate Kerri Walsh Jennings (L) celebrate winning the women's beach volleyball gold medal match at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Dominic Ebenbichler (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. and team mate Kerri Walsh Jennings (R) celebrate winning the women's beach volleyball gold medal match at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Dominic Ebenbichler (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. and team mate Kerri Walsh Jennings (bottom) celebrate winning the women's beach volleyball gold medal match at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Dominic Ebenbichler (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. and team mate Kerri Walsh Jennings (R) celebrate a point at the women's beach volleyball gold medal match at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. and team mate Kerri Walsh Jennings (R) celebrate a point at the women's beach volleyball gold medal match at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Dominic Ebenbichler (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. spikes the ball at the women's beach volleyball gold medal match at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Dominic Ebenbichler (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor (L) of the U.S. is seen with team mate Kerri Walsh Jennings before the women's beach volleyball gold medal match at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor (R) of the U.S. is seen with team mate Kerri Walsh Jennings at the women's beach volleyball gold medal match at the Horse Guards Parade during the London 2012 Olympic Games August 8, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor (C) of the U.S. hits the ball past her team mate Kerri Walsh Jennings during their women's beach volleyball semifinal match against China's Xue Chen and Zhang Xi at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

A general view shows the Horse Guards Parade during the women's beach volleyball semifinal match between China's Xue Chen and Zhang Xi and Misty May-Treanor and Kerri Walsh Jennings of the U.S. during the London 2012 Olympic Games August 7, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. celebrates with fans winning their women's beach volleyball semifinal match against China's Xue Chen and Zhang Xi at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL TPX IMAGES OF THE DAY)

Misty May-Treanor of the U.S. celebrates with fans winning their women's beach volleyball semifinal match against China's Xue Chen and Zhang Xi at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

China's Xue Chen and Zhang Xi return to position during their women's beach volleyball semifinal match against Misty May-Treanor and Kerri Walsh Jennings of the U.S. at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. celebrates with fans winning their women's beach volleyball semifinal match against China's Xue Chen and Zhang Xi at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Suzanne Plunkett (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. celebrates winning their women's beach volleyball semifinal match against China's Xue Chen and Zhang Xi at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Suzanne Plunkett (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

Dancers perform during abreak in the women's beach volleyball semifinal match between China's Xue Chen and Zhang Xi and Misty May-Treanor and Kerri Walsh Jennings of the U.S. at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Suzanne Plunkett (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

China's Zhang Xi reacts after missing a point during their women's beach volleyball semifinal match against Misty May-Treanor and Kerri Walsh Jennings of the U.S. at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Suzanne Plunkett (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

China's Xue Chen (R) and Zhang Xi fall while trying to save a point during their women's beach volleyball semifinal match against Misty May-Treanor and Kerri Walsh Jennings of the U.S. at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Suzanne Plunkett (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

Kerri Walsh Jennings (R) and Misty May-Treanor of the U.S. defend as China's Zhang Xi spikes the ball during their women's beach volleyball semifinal match at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Suzanne Plunkett (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

British Prime Minister David Cameron (R) and his wife Samantha react during the women's beach volleyball semifinal match between China's Xue Chen and Zhang Xi and Kerri Walsh Jennings and Misty May-Treanor of the U.S. at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Suzanne Plunkett (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor (R) and Kerri Walsh Jennings of the U.S. celebrate winning their women's beach volleyball semifinal match against China's Xue Chen and Zhang Xi at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

China's Xue Chen and Zhang Xi walk after losing their women's beach volleyball semifinal match against Misty May-Treanor and Kerri Walsh Jennings of the U.S. at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor (L) and Kerri Walsh Jennings of the U.S. celebrate winning their women's beach volleyball semifinal match against China's Xue Chen and Zhang Xi at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Suzanne Plunkett (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor (R) and Kerri Walsh Jennings of the U.S. celebrate winning their women's beach volleyball semifinal match against China's Xue Chen and Zhang Xi at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Suzanne Plunkett (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL TPX IMAGES OF THE DAY)

Misty May-Treanor (C) and Kerri Walsh Jennings of the U.S. celebrate winning their women's beach volleyball semifinal match against China's Xue Chen and Zhang Xi at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Suzanne Plunkett (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor (R) and Kerri Walsh Jennings of the U.S. celebrate winning their women's beach volleyball semifinal match against China's Xue Chen and Zhang Xi at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Suzanne Plunkett (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

Kerri Walsh Jennings (L) and Misty May-Treanor of the U.S. celebrate winning their women's beach volleyball semifinal match against China's Xue Chen and Zhang Xi at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Suzanne Plunkett (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL TPX IMAGES OF THE DAY)

China's Zhang Xi (L) tries to save a point past her team mate Xue Chen during their women's beach volleyball semifinal match against Kerri Walsh Jennings and Misty May-Treanor of the U.S. at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor (C) of the U.S. spikes the ball past her team mate Kerri Walsh Jennings during their women's beach volleyball semifinal match against China's Xue Chen and Zhang Xi at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor (L) of the U.S. returns the ball past her team mate Kerri Walsh Jennings during their women's beach volleyball semifinal match against China's Xue Chen and Zhang Xi at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. fails to save a point against China's Xue Chen and Zhang Xi during their women's beach volleyball semifinal match at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor (C) of the U.S. tries to save a point during their women's beach volleyball semifinal match against China's Xue Chen and Zhang Xi at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

Kerri Walsh Jennings and Misty May-Treanor of the U.S. prepare for their women's beach volleyball semifinal match against China's Xue Chen and Zhang Xi at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

Kerri Walsh Jennings and Misty May-Treanor of the U.S. arrive on court for their women's beach volleyball semifinal match against China's Xue Chen and Zhang Xi at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

Kerri Walsh Jennings (R) and Misty May-Treanor of the U.S. arrive on court for their women's beach volleyball semifinal match against China's Xue Chen and Zhang Xi at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Marcelo Del Pozo (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

Misty May-Treanor of the U.S. (R) defends against China's Zhang Xi during the women's beach volleyball semifinal match at Horse Guards Parade during the London 2012 Olympic Games August 7, 2012. REUTERS/Suzanne Plunkett (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)