Depends......
You could just throw a frisbee in the air, and it could be an UFO
Or...........
You could make a real jet powered one. You just need more resources, a
intelligent mind, and of course a vast imagination!
Alien+rocket=UFO
Air +metal= ufo
Alien+rocket=UFO
No
active robot+glass+metals+air
This question does not even make sense.
By make and model number.
a UFO See http://grammar.ccc.commnet.edu/grammar/abbreviations.htm (all the way to the bottom) for help determining when to use a or an before an abbreviation.
Probably at night if you glance at it, but I'm so interested in the UFO conspiracy, that when I see a plane at night I make sure it's just a plane........
Ufo's do exist because a Ufo is a thing in the sky that you can not explain.
They usually see UFO's at a UFO sighting
Yes, they make crop circles to show their message to us and decode it