Disclaimer: I do not own any clips or music. All clips and music belong to their respectful owners. I do not earn any money with this video. This video is for .\r<br>\r<br>Historical USOs Unidentified Submerged Objects Sightings - Top Documentary Films Please Subscribe my Channel: Facebook .\r<br>\r<br>An unidentified submerged object, or USO, is any object or optical or mechanical detection phenomenon of unknown origin observed under water that remains .\r<br>\r<br>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.
