Unexplained Mysteries has posted an intriguing 4-minute video purportedly recorded by the US Department of Homeland Security showing a UFO over Puerto Rico. The thermal camera footage is believed to have been recorded by the crew of a DHC-8 Turboprop on April 25, 2013, at the Rafael Hernandez Airport in Aguadilla. The object in question can be seen making an entry and exit from the sea, as well as appearing to split in two. Get more details here.