US authorities have launched an investigation over whistleblower claims the government are trying to develop weapons using reverse engineered alien technology.
David Charles Grusch, an Air Force veteran and former member of the National Geospatial Intelligence Agency, claims the US has recovered a number of extraterrestrial vehicles and has lied about it for decades.
The House Oversight Committee, the main investigative committee of the US House of Representatives, has launched the investigation and plans to hold a hearing over the topic.
The Pentagon has denied knowing about such a program, but said it would follow the "data".
The government department investigating UFOs is the All-domain Anomaly Resolution Office (AARO).
A spokesperson for the Department of Defense said: "To date, AARO (All-domain Anomaly Resolution Office) has not discovered any verifiable information to substantiate claims that any programs regarding the possession or reverse-engineering of extra-terrestrial materials have existed in the past or exist currently.
"AARO is committed to following the data and its investigation wherever it leads."
Mr Grusch told NewsNation: "These are retrieving non-human origin technical vehicles, call it spacecraft if you will, non-human exotic origin vehicles that have either landed or crashed.
"I thought it was totally nuts and I thought at first I was being deceived, it was a ruse.
"People started to confide in me. Approach me. I have plenty of senior, former, intelligence officers that came to me, many of which I knew almost my whole career, that confided in me that they were part of a program.
"Naturally, when you recover something that's either landed or crashed. Sometimes you encounter dead pilots and believe it or not, as fantastical as that sounds, it's true."
Speaking at the Capitol, Chairman of the House Oversight Committee, Rep James Comer told the same paper: "There will be a hearing on it, there will be oversight."
Rep. Anna Paulina Luna (R-Fla) and Rep. Tim Burchett (Rep-Tenn) have been appointed to lead the investigation.
A spokesperson said: "The House Oversight Committee is following these UAP reports and is in the early stages of planning a hearing.
"The National Defense Authorization Act for 2022 created the All-Domain Anomaly Resolution Office which coordinates among the Department of Defense, the intelligence community, NASA, and other federal agencies to study UAPs.
"Americans, who continue to fund this federal government work, expect transparency and meaningful oversight from Congress."
Mr Grusch said: "We are most definitely not alone," adding that "quite a number" of UFOs have been discovered.
