LONDON, ENGLAND - SEPTEMBER 09:  Prince Harry introduces the Foo Fighters at an Invictus Games Reception at the American Ambassador's Residence, Winfield House on September 9, 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 (Photo by Geoff Pugh - WPA Pool/Getty Images)