In this Tuesday, March 26, 2013 photo, copies of Caroline Kennedy's new 

In this Tuesday, March 26, 2013 photo, copies of Caroline Kennedy's new book "Poems to Learn by Heart" sit on display during an interview with The Associated Press in New York.  (AP Photo/Mary Altaffer)
Associated Press
In this Tuesday, March 26, 2013 photo, copies of Caroline Kennedy's new book "Poems to Learn by Heart" sit on display during an interview with The Associated Press in New York. (AP Photo/Mary Altaffer)
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