With Donald Trump at his Mar-a-Lago resort for Thanksgiving, it isn't the first time a president-elect has used Palm Beach as his vacation refuge. John F Kennedy's family estate, known during his term as the Winter White House, is seven miles north at the other end of Ocean Drive. Like Kennedy's visits, Trump's trips to Palm Beach will bring increased attention, some unwanted, to this wealthy enclave of about 10,000 people, a number that triples in the winter. ..... The attempt on Kennedy's life Domestic terrorism nearly claimed Kennedy in December 1960, a month before he took office. Richard Pavlick,...