>> i believe very firmly that ruby and oswald knew each other, and certainly tippet and ruby knew each other. >> before we proceed with that kind of questioning, let me ask you. what kind of conspiracy do you think? was it a communist? left wing or right wing conspiracy? >> i am convinced that there were two riflemen. >> the warren commission was set up, as you know, at the request and urging of the communist party. >> it's obvious that he was working for somebody else at that moment, and that somebody else could not be anyone else than fidel castro. >> there's no doubt of oswald having been in the window of that building. >> my opinion, castro -- violence. >> there was an entire world of assassination. but some raised valid questions.