Various specialist researches believe that various unidentified flying objects were caught on camera by US submarines in 1971. There is a lot of substantial evidence that has been found by researchers from the US Submarine USS Trepand SSN 674. They all point to secret US aircraft tests that were undertaken to identify various alien life forms that came to Earth for tracking purposes. Alex Mistretta, who is a paranormal investigator examined the images after they were first caught on camera and came to the conclusion that the images are completely authentic. He claimed the pictures were taken during the journey of the submarine from Iceland to Norway.