"UFO" means "something I see in the sky and don't know what it is". They can't do anything to you at all.
Some people seem to think UFO is an acronym for "Alien Space Craft", but if that were true the words would be "Ulien Fpace Oraft". No UFO ever seen is known and proven to have been an alien space craft. In fact, in real life, aliens are not known and proven to exist. After all, someone has to be the first form of intelligent life in the universe. There is no reason to think it isn't us.
So the answer to your question is "nothing".
yes
Unidentified Flying Objects are objects which we are, by definition, unable to identify, and thus we will have no idea as to how they are able to fly.
Unidentied Flying Objects are UFOs.
Because the term UFO means unidentified flying object
Unidentified Flying Objects.
James E. McDonald has written: 'Unidentified flying objects' -- subject(s): Unidentified flying objects
The initials for unidentified flying objects are UFO.
ufology ' U.F.O.logy ' The Studt of Unidentied Flying Objects.
Bill Startup has written: 'Kaikoura Unidentified Flying Objects' 'The Kaikoura UFOs' -- subject(s): Unidentified flying objects
Unidentified Flying Objects The True Story of Flying Saucers - 1956 is rated/received certificates of: USA:Approved (certificate #17778)
All kinds of people. UFOs are real (unidentified flying objects), but aliens don't have to be inside of them.
Gary Bates has written: 'Alien intrusion' -- subject(s): Creationism, Religious aspects, Religious aspects of Unidentified flying objects, Unidentified flying objects