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(L to R) The Duke of Edinburgh, Prince William, Earl Spencer, Prince Harry and Prince Charles walk outside Westminster Abbey during the funeral service for Diana, Princess of Wales, 06 September. Hundreds of thousands of mourners lined the streets of Central London to watch the funeral procession. The Princess died last week in a car crash in Paris. (Photo credit should read JEFF J. MITCHELL/AFP/Getty Images)

(L to R) The Duke of Edinburgh, Prince William, Earl Spencer, Prince Harry and Prince Charles walk outside Westminster Abbey during the funeral service for Diana, Princess of Wales, 06 September. Hundreds of thousands of mourners lined the streets of Central London to watch the funeral procession. The Princess died last week in a car crash in Paris. (Photo credit should read JEFF J. MITCHELL/AFP/Getty Images)