Roswell has been at the heart of the UFO scene since the military sensationally announced in a press release in July 1947 it had found the remains of a crashed flying saucer in the desert nearby.
But the following day it retracted the statement, saying it was in fact a damaged US Air Force air balloon.
Witnesses later came forward to say there had been alien bodies within the “crashed craft”, which along with the wreckage, were then taken to the mysterious top-secret Area 51 military base in Nevada.
Now conspiracy theorists believe the crash could have been a top-secret test of Nazi technology, that was being developed in a base like Area 51.
The N24 channel documentary “UFOs in the Third Reich” claims the incident was actually a result of tests of a copper-coloured craft called the “Bell”.
With a three-metre diameter, its core was a futuristic propulsion unit using electric particles, and was designed by a Nazi engineer, it is claimed.
It was seen as the forerunner of today’s stealth fighters and developed by V2 rocket experts brought to the US after WWII ended in a bid to give the US an advantage over the Soviet Union in terms of military aircraft.
During the war, Nazis had been experimenting with new technology, including bizarre flying saucer-shaped craft.
One of the experts was allegedly General Hans Kammler, an SS general.
Kammler was head of construction and defence projects´in the Third Reich and planned the death camp at Auschwitz and secret V2 rocket plants in Germany.
Igor Witkowski, a Polish former journalist and historian of military and aerospace technology, wrote the book Prawda O Wunderwaffe.
It told of “bell-shaped craft” that were created by the Nazis, and described how Hitler wanted the best scientists and engineers to develop them.
German engineer Georg Klein who became an aeronautical engineer after the war, said: “I don’t consider myself a crackpot or eccentric or someone given to fantasies.
“This is what I saw, with my own eyes; a Nazi UFO.”
The documentary also looks at the possibility the Roswell Incident was the crash of a Nazi craft called the Schriever-Habermohl, that was developed in Prague from 1941 to 1943.
The plans for it were taken back to America after the war.