UFO Investigation

Now we have official recognition of UFO sightings.

http://www.dw.com/en/the-us-pentagons-secret-investigation-into-ufos/a-41830522

The way I see this kind of thing is like this:

1. The Russians must have some scary technology, or
2. There's a lot of things happening in our atmosphere we just don't understand yet, or
3. People can do some clever tricks with cameras, or
4. The USA has some scary technology that it doesn't even tell its own military about, or
5. Some private individual has invented some clever stuff and not told anyone about it, or
6. There really are some unexplained or unexplainable extraterrestrial happenings.

On that last one, how come these extraterrestrials don't make contact? And once detected and they leave Earth, why can't we track them to see which direction they head? And once these intruders are out there and they hit their warp drive (or whatever you want to call it), how come we can't observe that too?

Okay so depressing thought of the day; we need to get over it, right now, as things stand, we're alone in the observable universe. This is not to say that there has never been other intelligent life, or that there won't be after we're gone, but right now we're it. At least that's my guess. But heh, I like to speculate along with everyone else.