Let's be clear: 'UFO' stands for Unidentified Flying Object. Any time that you see something flying and you are not entirely sure what it is, you are looking at a UFO. However, in the sense that UFO means "alien spacecraft", there have been no proven accounts of one existing.
Yes, there are.
UFOs have been reported in virtually all of the states at one time or another.
None recorded.
UFOs aren't for sale. Any UFO's that may have been recovered would be in the possession of top military personel.
UFOs are by their nature, impossible to prove. If they were proven, they would be identified and would cease to be UFOs.
No accurate records exist.
Two offical sightings reported.
UFOs are simply things that not readily identified. They are not 'alien' spaceships. Nor do they defy gravity and there are many phenomena that do not make any noise.
No their isn't any
Yes, its called an Unidentified Flying Odor
Where humans and alcohol are, UFOs will be.
Evidence is lacking as to whether unidentified flying objects originate from Mars. No answer as to the nature and origin of UFOs has been found in the course of any of the space probes or manned space flights thus far. Neither has an answer to the question of the point of origin of UFOs been found among any of the information gathered by the space station or by any of the earth-orbiting satellites.