John F Kennedy 100

CHATSWORTH, ENGLAND - APRIL 04: The grave of Kathleen Agnes Cavendish, (nee Kennedy) Marchioness of Hartington, sits in the churchyard of St Peter's Church, Edensor on April 4, 2017 in Chatsworth, England. Kathleen Cavendish was the sister of President John F. Kennedy, and was married to William Cavendish, the Marquess of Hartington, heir apparent to The 10th Duke of Devonshire. On Saturday July 29, 1963, the President of the United States, John F Kennedy visited his sisters grave at Edensor in the grounds of Chatsworth. (Photo by Christopher Furlong/Getty Images)