If by chance you are interested in Unidentified Flying Objects (UFO’s) and what is real and what is not, home grown or otherwise; you may want to watch this video with Steven Greer. It is a multifaceted subject and by necessity can’t be explained in just a few words so it is a little bit long, but it is worth watching.
https://youtu.be/p2hk8Qp8dd0?t=14
I refuse to watch anything by Dr. Greer. I think he makes stuff up.