But, Jan Harzan, executive director of the Mutual UFO Network (MUFON), says UFOs HAVE been recovered and ARE being stored nearby.
Mr Harzan claims there is a secret underground facility built into the base of the Papoose Mountains, in Lincoln County, Nevada, where recovered alien space crafts and extra terrestrial beings are kept hidden away.
Ever since the legendary Roswell UFO crash of July 1947 alien conspiracy theorists have claimed the remains of a flying saucer, and even dead aliens, were secretly taken into storage - something the US Government denies.
Roswell has been at the heart of the UFO scene since July 1947 when the military sensationally announced in a press release 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 away. There has been speculation the remains were taken to Area 51 in the Nevada desert, or the Wright Patterson Airforce base near Dayton, Ohio.
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