All unidentified flying objects seen over the past 70 years were secret Government experimental craft, according to an expert in the unexplained who researched the subject.
Author Mark Pilkington said agencies like the CIA in the USA were behind a huge double bluff, and were happy the public believed they were alien craft as it took the heat off the top-secret projects that were really going on.
The British author claims the strange craft sighted around the world really do exist – but they are not aliens.
Flying saucers and unidentified aircraft are actually secret technology being developed mostly by the US, he claims.
Mr Pilkington claimed a shadowy organisation he dubbed “mirage men” were behind the global double bluff, Dailystar.co.uk reports.
He has produced a new documentary of the same name he boasted exposes the truth behind UFOs.
He claimed the secrecy all started with the Roswell UFO mystery of July 1947.
Roswell has been at the heart of the UFO scene since in July 1947 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 to a mysterious top-secret military base.
There have been claims and counter claims, including that the bodies were crash test dummies and it had been a top-secret balloon spying on the Russians.
All the confusion means it is one of the world’s biggest conspiracy theories to this day.
Mr Pilkington claims Roswell is one of the “most famous examples” of the work of the mirage men.
He told Sputnik: “In the early 1950s the US military was testing a lot of new technologies and it was convenient to disguise them as UFOs.
“It was a double bluff.”
Mr Pilkington added the US Air Force found people were more easily accepting of rumours about UFOs and aliens than any other explanation of the secret aircraft.
Mr Pilkington is not the first researcher to propose that some UFOs are secret spy craft, but he appears to be the first to suggest they all are.
many alien conspiracy theorists claim that officials did recover a crashed alien flying saucer at Roswell and it was “reverse engineered” at the secretive Area 51 US Air Force base in Nevada to create top-secret anti gravity spy craft including the legendary TR-3B triangular craft.
While, it is widely accepted research on new air craft takes place at Area 51, it has never been proved any alien technology has ever been recovered or reverse engineered.
It also well recorded the US was developing strange experimental aircraft during the Cold War with the Soviet Union.
Pentagon bosses even had their own flying saucer called the Avrocar, known as Project Silverbug.
Mr Pilkington claims the history of UFO sightings is intertwined with the history of the Cold War.