U.S. President John F. Kennedy (1917 – 1963) (C) and First Lady Jacqueline Kennedy (1929 – 1994) pose with their family on Christmas Day at the White House, Washington, D.C., December 25, 1962. (L-R): Caroline Kennedy, unidentified, John F. Kennedy Jr. (1960 – 1999), Anthony Radziwill (1959 – 1999), Prince Stanislaus Radziwill, Lee Radziwill, and their daughter, Ann Christine Radziwill. (Photo by John F. Kennedy Library/Courtesy of Getty Images)