This is a special series of four videos dealing with the many natural and artificial things that could be seen in the sky and probably could cause "UFO" reports.
The purpose of this series is to educate the general public.
The videos are produced by "Evidencia X", a program of TV on line originated in México.
I extend my big thanks to the investigative journalist and good friend César Buenrostro, in México City, for the great job so well done.
The videos are in Spanish.
You can see them in: https://www.youtube.com/watch?v=HpF5BmXIkGE