[dragnet2]

I believe, in fact, that our military is responsible for them

That begs the question, what's their motive for doing all this and then pretending they have no idea what they are?

[RoosterRedux]

And other countries are reporting the same thing.

[dinodino]

You’d have to ask the folks in charge of whatever program this is. If it’s testing of black budget technologies, obviously it would be in the government’s best interest to disavow knowledge of these things.