Kennedy Nonfiction: Before You Read - Primary or Secondary Source

I would want to learn about a primary source about J.F.Kennedy's death. I mean he was about to discover life on different planets which meant to evolution. But as of today John F.Kennedy's expierement is still active. So what ever's happening in NASA, or Area 51, it's kind of sad how we don't know what's going on, what were dealing with, what is being held captive. That's crazy if we approach an alien species, changes reality to have seen another active humanoid. There's hover boards being built, but anyway when he get's shot doesn't this lead to anything, my theory would be hiding a humanoid. Something absurd, would Kennedy have changed anything, or would he tell the truth while the illuminati come's up with a plan.