I’m here to contradict all these ‘deep cover’ people.
Worked with guys who had worked on this stuff.
Yes - lots of unexplained phenomenon. Incredibly fast moving balls of light. Visual reports. But absolutely nothing tangible. No credible photos of ships. No crash debris. Nothing. No alien technology (they snorted at that one).
Maybe they were lying to me. Don’t think so - their frustration seemed genuine.
What about Velcro?