Unidentified Submerged Objects USOs UFO Documentaries

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Historical USOs Unidentified Submerged Objects Sightings - Top Documentary Films Please Subscribe my Channel: Facebook .\r
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An unidentified submerged object, or USO, is any object or optical or mechanical detection phenomenon of unknown origin observed under water that remains .\r
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An unidentified flying object, or UFO, in its most general definition, is any apparent anomaly in the sky that is not identifiable as a known object or phenomenon.