Yes, they are UFOs...

 ...no, they are most likely not aliens. I'm talking about the weird objects that the U.S. military keeps shooting down.

They are unidentified flying objects or unidentified aerial objects until we know what they are. Yes, I am a pedant about this because it drives me nuts.

If we did know they were aliens, they would not be UFOs.

I think they are more likely part of some kind of experiment...