Don't have a clue, but just like you said, this is exactly the kind of thing that I'm actually interested in. I was raised to be open, but skeptical. So for soooo many "sightings" I simply roll my eyes and chalk it up to any number of things, including people just plain lying.

But this? Military origin with absolutely no agenda behind it, years of experts from various fields weighing in, and still no one can explain it fully. Gives me goosebumps.