Landed alien spacecraft. Computer artwork of an alien spacecraft that has landed in a desert on Earth. This artwork is based on accounts of the Roswell incident, which took place near Roswell, New Mexico, USA. It was near here on the evening of 2 July 1947 that many UFO sightings were reported during a thunderstorm. Next morning, a rancher, Mac Brazel, discovered strange wreckage in a field. When the impact site was located, a UFO craft and alien bodies were allegedly found. The official explanation was that it was a crashed weather balloon. Conspiracy theorists believe that the true events were kept secret.