MAD CONSPIRACY THEORY: JFK, as POTUS, had access to the FTL drive of the saucer that crashed at Roswell.
FTL implies time travel. So it's a time machine.
He saw his 2nd term would be dominated by the Vietnam War turning to shit, so he assassinated himself to trigger a grandfather paradox then bumped off Elvis and replaced him then lived happily ever after.
This is as plausible as the current Taylor Swift nonsense, amirite?
