Passengers on Plane Spot and Videotape UFO

On a plane bound for Greece, a man has videotaped an unknown flying object which was flying alongside the jet.

The footage was shared by passenger Kerry Flores on YouTube and has been seen by many over the worldwide video site.

Comments from viewers included:

"Incredible video catch. I'm thinking you got a UFO," was one comment. While others weren't convinced and said that it was a trail of smoke from another plane.

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