Roswell

Roswell Incident, has been turned into a cheap tourist attraction. And yet according to Colonel Philip Corso most of our technology comes from a crashed alien flying saucer. In his book,"The Day After Roswell" he charts for us how the technology transfer from alien UFO to American industry took place.

On timelines without the Roswell Incident, we have a lot less scientific advancement. We are still using vacuum tube TV, and there is no internet.