After his uncle Robert was 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 Nixon showed him the '' Resolute '' desk under which his father had let him play . When Onassis died in 1975 , he left Kennedy $ 25,000 , though Jacqueline was able to renegotiate the will , and acquired $ 20 million for herself and her children
Robert was assassinated
Assassination of Robert F. Kennedy
John F. Kennedy Jr.