Jean Kennedy Smith, the last surviving sibling of President John F. Kennedy and a former ambassador to Ireland, died Wednesday, her daughter confirmed to The New York Times. She was 92. Smith died at her home in Manhattan, daughter Kym told the Times. Smith was the eighth of nine children born to Joseph P. and Rose Kennedy, and she tragically outlived several of them by decades. Her siblings included older brother Joseph Kennedy Jr., killed in action during World War II; Kathleen Kennedy, who died in a 1948 plane crash; the president, assassinated in 1963 and Sen. Robert F. Kennedy,...