Today I happened to have reason to talk with a coworker about the time someone dropped a socket in a nuclear missile silo and caused an explosion. Related to that is the fact that the US government has response teams to deal with the fact that nuclear missiles sometimes feel a yearning to break free from the confines of their silos and try to launch themselves. Then I got to thinking about how FF would frequently claim that "weird shit" would happen at nuclear reactors and nuclear missile silos when there were UFOs around. At which point I said, "Huh, an easy way to cover up that some defective hardware nearly caused a bad accident, would be to claim that all the lights people saw in the area were aliens and not the 'Oh, shit!' Squads sent in to try and keep things from going kablooey! And that's almost certainly what's been going on."
Huh. Wonder why FF never promoted this as being an alien. https://www.metmuseum.org/art/collection/search/312558
Hey, didja know that there's a company that's been working on a space program in secret? People caught a glimpse of their first rocket, and it doesn't look like what you'd expect. Point being that there's probably all kinds of planes/spacecraft being worked on that most people don't know about and if someone were to see them flying, a whole lotta people would say, "Aliens!"