一九六三年十一月二十二日,美国第三十五届总统约翰·肯尼迪到德克萨斯州达拉斯城访问,在乘车经过市区街道时遇刺身亡。谋杀总统事件在美国历史上并不罕见,但肯尼迪之死却产生了特殊的反响。二十多年来,人们对此案一直没有淡忘。肯尼迪是阴谋的牺牲品,这是朝野一致公认的。那么,真正的凶手是谁?究竟是什么缘故使此案成为一件结束不了的悬案呢? On November 22, 1963, the 35th President of the United States, John F. Kennedy, visited Dallas, Texas, and was assassinated as he passed downtown streets. The murder of the president was not uncommon in the history of the United States, but the death of Kennedy had a special response. For more than two decades, people have never forgotten the case. Kennedy is the victim of a conspiracy, which is unanimously recognized by both the ruling and opposition parties. So, who is the real murderer? What exactly makes the case an overhang?