John F. Kennedy Jr. assassinated in 1968, his mother took him and his sister out of the United States, saying: "If they're killing Kennedys, then my children are targets ... I want to get out of this country." The same year, she married Greek shipping tycoon Aristotle Onassis, and the family went to live on his private island of Skorpios. Kennedy is said to have considered his stepfather "a joke". In 1971, Kennedy returned to the White House with his mother and sister for the first time since the assassination. President Richard Nixon's daughters gave Kennedy a tour that included his old bedroom, and
Aristotle Onassis was 17 at the time of their marriage; Onassis was 40. Onassis and Livanos had two children, both born in New York City: a son, Alexander (1948–1973), and a daughter Christina (1950–1988). Onassis named his legendary super-yacht after his daughter. To Onassis his marriage to Athina was more than the fulfillment of his ambitions. He also felt that the marriage dealt a blow to his father-in-law and the old-money Greek traditionalists who held Onassis in very low esteem. The couple had become largely separated by the mid-1950s, with the end of the marriage coming after Livanos found Onassis in bed