I've lead my students in studying the turbulent 1960s- focusing on the assassination of JFK. We went to talk to local author, Jim Marrs, to learn what his ideas were on the topic. He's a conspiracy theorist- and I think my students really enjoyed hearing from him. I know I did. He thinks pretty much all the important/powerful people in the country wanted JFK dead- and Dallas was their last chance to get him before re-election year when security and media coverage would increase. Oswald was a patsy- even a composite- a spook or two who was sacrificed for the plan. There's a six hundred page book called Cross Fire to explain it all.