A NewsNation special report airing Saturday, “Reality Check with Ross Coulthart: Underwater UFOs,” examines the idea that alien civilizations could be hiding in the depths of Earth's oceans. Special correspondent and investigative journalist Ross Coulthart joins “Elizabeth Vargas Reports” with a preview. “There is a vast number of people who are willing to go on the record to say they have witnessed anomalous phenomena underwater doing extraordinary things,” he says. #UAP #UFO #Oceans | NewsNati