This is what I generally see happening any time these things come up. A dismissive half-answer that does not address the physical requirements of the phenomenon

This is what I generally see happening any time these things come up. A dismissive half-answer that does not address the physical requirements of the phenomenon. I am not in the "it's aliens" crowd. But I am also not shutting down half my brain so as to ignore the the materials science and exotic energy requirements that would be necessary to reproduce these phenomena. I am a strong proponent of Occam's Razor. But in order to use Occam's Razor, you have to account for all observations, not dismiss half of them. As to their being drones: almost certainly. And that's actually the scariest thought. If they are, in fact, hypersonic drones (whatever the origin), then we are in deep shit.