This document provides information about unidentified flying objects (UFOs) including their description, myths and facts, Project Blue Book, signs of UFOs, some famous sightings, witness interviews, and movies based on UFOs and aliens. It describes UFOs as crescent or circular objects that are often attributed to extraterrestrial life. It discusses Project Blue Book, the US Air Force study of UFOs from 1952-1969, and debunks common myths about UFO sightings. Examples of famous sightings are provided along with interviews of witnesses describing their experiences. Movies like ET, Signs, and Incident at Roswell are analyzed for their depictions of real UFO phenomena.