All the people here claiming new types of drones and secret programs dating back decades have clearly never worked in defense. Most of the US military, the best funded in the world, is decades behind the private sector on computing technology -- it's honestly unthinkable to me that their propulsion technology would be decades (or centuries) ahead. The best engineers and scientists have taken Silicon Valley jobs payin…
There is a huge amount of ground between aliens are visiting Earth and your family is nuts. We don't understand a lot of things about our world, doubly so for your average layperson. When we encounter something we can't recognize, we look for patterns and aspects we do recognize. That impacts the way we view things and our memory. There are all sorts of stories about how people's native languages impact the way the view the world for example. Maybe your family saw a "a classic silver flying saucer" or maybe they just saw something they couldn't explain and a "classic silver flying saucer" was the closest thing their brains could come up with.
That is why the potential recovery part of this story is so important. It takes the fallibility of the human brain out of the equitation and would provide direct physical evidence beyond "I saw something that looked weird" level of evidence that we have previously lived in when it comes to UFOs.