This week marked 60 years since President John F Kennedy was shot dead as he travelled in the back of a car through the streets of Dallas, Texas. From the moment the news broke, people had their theories about what happened. So why did the assassination of JFK spawn dozens of conspiracy theories that have persisted for decades? Is there a reason why Americans are quick to believe their government is covering something up? And despite multiple examples of when conspiracies turn dangerous, are politicians today, including Kennedy’s own nephew, using conspiracy theories for political gain? This week, Jonathan Freedland speaks to Prof Kathryn Olmsted, author of Real Enemies: Conspiracy Theories and American Democracy, World War I to 9/11