Are you saying you believe they are real craft vs CGI?
If so, your basis for your convictions?
I have not seen one of them, if that is the nucleus of the question. I am thinking there is a phenomenon which makes them possible.
Superconducting Levitation Produced by a University inTaiwan
I have seen a small UFO in the High Uinta mountains of Utah. Little silver thing, not a mylar balloon, gracefully flew over our campsite and maintained an intelligent course right up the mountain side, 5 minutes of viewing.
I may do a brief search for threads on Free Republic from the time when those pictures were new. I'll post a link or two, if I find them.