My personal experiences have been with twilight missile launches from Vandenberg. I was in the squadron that launched the Minuteman missiles and I can't count the times I have been confronted by people who claim they were extraterrestrial events.
People made claims that they were tears in the time space continuum or wormholes opening up. When I confronted them that these are theoretical phenomena mostly promoted by science fiction, they melted down almost to the point of violence. They can be a scary bunch.
There was an amazing event in 1962 at Loring AFB in Maine.
A huge craft (larger than a football field) hovered over the main air-strip with dozens of witnesses.
The people from the tower watched in shock as the airmen on the field were “turned into zombies” for several minutes.
The source for this information is this book:
https://www.amazon.com/Confession-Hidden-Alien-Encounters-Revealed/dp/1695688856
One of the authors also wrote this book that lists dozens of incidents at nuclear sites:
https://www.amazon.com/UFOs-Nukes-Extraordinary-Encounters-Nuclear/dp/1544822197
We are talking many witnesses, all kinds of radar, jets scrambled to intercept the craft etc etc etc. for decades over dozens of these sites.
“My personal experiences have been with twilight missile launches from Vandenberg.”
I grew up with a great view of those. There was never a question of what they were. No question what the parachute flares were either. Everybody was hip.
What I saw two different times were not those or anything like those. They were physically impossible with our technology then or now.
I had a similar experience when I saw a Vandenberg SpaceX launch near Christmas 2018. I was in Death Valley at the time. What kills me is that these launches happen all the time and Californians still lose their minds when they see them. UFO people are mental, no doubt about it.