Invictus Games - Opening Ceremony [Getty Images]

LONDON, ENGLAND - SEPTEMBER 10: Camilla, Duchess of Cornwall and Prince Charles, Prince of Wales laugh during the Invictus Games Opening Ceremony on September 10, 2014 in London, England. The International sports event for 'wounded warriors', presented by Jaguar Land Rover, is just days away with limited last-minute tickets available at www.invictusgames.org (Photo by Chris Jackson/Getty Images)

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