UFO Caught Over Ireland -- or California

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A video purporting to show a UFO drifting over Ireland is making the rounds in British tablets. But what does it really show?

The video, showing a triangular formation of lights ostensibly invisible to the naked eye, was posted to the Web site of British tabloid The Sun. The paper reports that experts reckon the sighting near Dublin could be a secret aircraft -- or a spacecraft.

Nick Pope, who probed mystery sightings for the U.K.'s Ministry of Defense, told the paper that "the video seems to have been taken through a night scope and presumably shows things not visible to the naked eye."

"It appears to show a structured craft moving at incredible speed. The configuration of the lights is unlike any aircraft I've ever seen. It's either some secret prototype aircraft or drone, or something considerably more exotic."

The Web site People's Daily Magazine pointed out that the video in question was posted to video-sharing Web site YouTube in December of 2008 -- where it is listed as having been filmed in Fremont, California.

The real reason behind the UFO story and video? The Sun is taking on the task of running the U.K.'s UFO-report bureau after Ministry of Defense closed it down last year.

A spokesman for the Ministry told The Sun, "We do not feel there is any military value in reviewing the public's sightings."