In his 2000 book The Day John Died , Christopher Andersen wrote that Jacqueline had also worried that her son would die in a plane crash .
In his 2001 book The Day John Died , Christopher Andersen wrote that Jacqueline had also worried that her son would die in a plane crash , and asked her longtime companion Maurice Tempelsman `` to do whatever it took to keep John from becoming a pilot '' .
John F. Kennedy Jr.