A new sci-fi film by Steven Spielberg is being praised by critics, with some considering it his best work in 20 years. The film, reportedly titled "Disclosure Day", appears to be a return to the sci-fi genre for Spielberg after an 8-year hiatus. The movie's themes of UFOs and extraterrestrial visitors are said to be rooted in decades of real UFO history, a subject that has long fascinated the director.