Death was merciful to Jacqueline Kennedy Onassis, for it spared her a parent's worst nightmare: the loss of a child. But if Jackie had lived to see her son, JFK Jr., perish in a plane crash on his way to his cousin's wedding, she would have been doubly horrified by the familiar pattern in the tragedy. Once again, on a day that should have been full of joy and celebration, America's first family was struck by the Kennedy Curse.In this probing expose,...