The UFO crash at Roswell, New Mexico in July 1947 is probably the best-known UFO case in the world. This book provides a report on the world-famous "alien autopsy" film which shows a dead extraterrestrial being autopsied by US Air Force medical personnel. There has been a congressional investigation into the truth of what happened, with the Air Force claiming that it had lied to the public for nearly five decades. The research into the autopsy film is described and eyewitnesses are quoted. The book discusses the film with experts from around the world, including pathologists from the US, Italy, Norway, Switzerland and Germany. It also provides evidence of another UFO crash in New Mexico one month before the Roswell event, and shows that the alien autopsy footage comes from that crash, not Roswell.