Well they could be AI. Explanations of their tech based on ufo maneuvers has been around for 50 years. To produce no G forces the craft would have to be in a negative gravity field. Electromagnetic fields would have to be phenomenal. I would like to see where they are serviced. Maintanence free craft seems like an impossibility to me.

Why do they have the need for daily flights???

Bill is your tech really better than the US military?