Frederick Valentich disappeared never to be heard from again.

During a training flight in 1978, Frederick Valentich disappeared never to be heard from again. At around 4500 feet, Valentich reported that he was being followed by an unidentified aircraft. However, air traffic controllers told him that there were no other aircraft in the area. Valentich went on to describe seeing four bright lights on the aircraft and that it was currently circling his plane. After experiencing engine problems he was asked to describe the aircraft. He responded simply “It isn’t an aircraft.” The transmission was then interrupted by a metallic scraping noise. To this day there has been no trace found of Frederick Valentich.