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LONDON, ENGLAND - NOVEMBER 13: Prince Harry and Queen Elizabeth II in conversation, as Ed Parker (left), co-Founder of Walking with the Wounded and team mentor of Team USA as Team UK look on during a reception to meet the three teams of wounded servicemen and women from the United Kingdom, the United States and the Commonwealth ahead of the Walking With The Wounded South Pole Allied Challenge at Buckingham Palace on November 13, 2013 in London, England. (Photo by Yui Mok - WPA Pool/Getty Images)

LONDON, ENGLAND - NOVEMBER 13: Prince Harry and Queen Elizabeth II in conversation, as Ed Parker (left), co-Founder of Walking with the Wounded and team mentor of Team USA as Team UK look on during a reception to meet the three teams of wounded servicemen and women from the United Kingdom, the United States and the Commonwealth ahead of the Walking With The Wounded South Pole Allied Challenge at Buckingham Palace on November 13, 2013 in London, England. (Photo by Yui Mok - WPA Pool/Getty Images)