Raymond Szymanksi, an ex-engineer at the Wright-Patterson Air Force Base (WPAFB), says that aliens from the infamous Roswell incident in 1947 were transported from the alleged crash site in New Mexico to the Dayton,Ohio, military base.

Mr Szymanksi has revealed the “secrets” of the base in his new book ’50 Shades of Greys’ and he is believed to be the first person to blow the whistle on the aliens at WPAFB.

The engineer-turned-alien hunter says that he was first made aware of aliens at UFOs by his mentor, who he has named ‘Al’.

He says that Al showed him a series of tunnels and vaults beneath the surface which was both a home and burial site to ETs.

Mr Szymanksi said: “[Al] said that in 1947 there was a crash down in Roswell and they brought the machines and the aliens here for inspection and said they keep them in secret tunnels under the base.

“When I asked him how he came to know about the secret, he responded, 'Everybody who works on base knows’.”

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