Originally Posted by McHrozni
I don't know. Not without some research I don't have time for.
If they could have steady video from geosynch orbit, that could see in any detail, they could see no jets flying over a certain area in that whole time. Do that for all major cities in question, and you've got proof! (as if that makes any sense)
Otherwise, I can't think of anything that I know makes sense, but that's not saying much. I'm way behind on what satellites can pick up. Collated ground radar info beamed up somehow, electrostatic discharge paths that can be seen for days, disruptions of the ether, remote viewing?