Do you believe in UFOs?
Well, I certainly believe that there are lights or other phenomena in the sky that have not been able to be explained. Do I believe these are from alien life forms performing reconnaissance on the world? No. I just believe that there are some things that cannot be explained.
I have never personally seen a UFO, but I believe other people have. Eventually most of the phenomena are explained in a rational way. That is my answer to the UFO question.