In part 2 of a special bonus episode of our Conspiracy series, Rob Attar and Gerald Posner delve deeper into the questions surrounding the assassination of JFK. Who did Lyndon Johnson think was behind the murder? Why do so many people believe in a conspiracy theory? And why is Lee Harvey Oswald’s other killing rarely discussed? The HistoryExtra podcast is produced by the team behind BBC History Magazine. Learn more about your ad choices. Visit podcastchoices.com/adchoices