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Senator John Fitzgerald Kennedy (1917 - 1963), Democratic senator for Massachusetts, escorts his bride Jacqueline Lee Bouvier (1929 - 1994) down the church aisle shortly after their wedding ceremony at Newport, Rhode Island. (Photo by Keystone/Getty Images)

Senator John Fitzgerald Kennedy (1917 - 1963), Democratic senator for Massachusetts, escorts his bride Jacqueline Lee Bouvier (1929 - 1994) down the church aisle shortly after their wedding ceremony at Newport, Rhode Island.   (Photo by Keystone/Getty Images)

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10th December 1960: Jackie Kennedy (1929 - 1994), the wife of the American President-Elect John F Kennedy with her son John Kennedy Jr (1960 - 1999). (Photo by Keystone/Getty Images)

10th December 1960:  Jackie Kennedy (1929 - 1994), the wife of the American President-Elect John F Kennedy with her son John Kennedy Jr (1960 - 1999).  (Photo by Keystone/Getty Images)

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American First Lady Jacqueline Kennedy (1929 - 1994) stands with her husband, President John F. Kennedy (1917 - 1963), in the door of the White House, Washington, D.C., circa 1961. (Photo by Hulton Archive/Getty Images)

American First Lady Jacqueline Kennedy (1929 - 1994) stands with her husband, President John F. Kennedy (1917 - 1963), in the door of the White House, Washington, D.C., circa 1961. (Photo by Hulton Archive/Getty Images)

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Jackie kennedy, circa 1960 . (Photo by REPORTERS ASSOCIES/Gamma-Rapho via Getty Images)

Jackie kennedy, circa 1960 . (Photo by REPORTERS ASSOCIES/Gamma-Rapho via Getty Images)