A Congressman has said the world is being lied to about UFOs as he called for the full disclosure of what the US really knows about the phenomena.

Rep. Tim Burchett - a long-term advocate for disclosure - said sensational claims by a new Pentagon whistleblower are just the tip of the iceberg.

And he challenged someone inside the defence department to come forward with hard evidence - such as a photo or video - to truly blow the lid off the "cover-up".

"Congress has been lied to, and the public have been lied," Burchett told The Sun Online.

"But we gotta have that one person who walks out with a tape or something."

He added: "I would tell any whistleblowers to come out, your country needs you."

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