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WASHINGTON, UNITED STATES - NOVEMBER 11: Diana, Princess Of Wales, Talking To Her Husband, During A Visit To The British Embassy. The Princess Is Wearing A Taffeta And Lace Gown With A Scalloped Neckline Designed By Murray Arbeid With Queen Mary's Diamond And Pearl Tiara, A Present From The Queen. (Photo by Tim Graham/Getty Images)

WASHINGTON, UNITED STATES - NOVEMBER 11:  Diana, Princess Of Wales, Talking To Her Husband, During A Visit To The British Embassy.  The Princess Is Wearing A Taffeta And Lace Gown With A Scalloped Neckline Designed By Murray Arbeid With Queen Mary's Diamond And Pearl Tiara, A Present From The Queen.  (Photo by Tim Graham/Getty Images)