After the assassination and funeral of her husband, Kennedy and her children retired from public life. In 1968, she married Greek businessman Aristotle Onassis, which made her less popular. After Onassis's death in 1975, she had a career as a book editor in New York City, first at Viking Press and then at Doubleday. Even after her death, she is seen as one of the most popular and well known first ladies in American history. In 1999, she was listed as one of Gallup's Most-Admired Men and Women of the 20th century. She died of non-Hodgkin lymphoma in 1994 and was buried at Arlington National Cemetery next to President Kennedy.