A whistleblower has claimed that the United States government is concealing a programme which deals with the retrieval and reverse engineering of unidentified flying objects (UFOs).

The Pentagon has denied all of the allegations.

Major David Grusch, a retired Air Force intelligence officer, said he was asked in 2019 by the head of a government task force on UFOs - or unidentified aerial phenomena (UAP) - to identify all highly classified programmes relating to the task force's mission.

At the time, Major Grusch was detailed to the National Reconnaissance Office, the agency that operates US spy satellites.

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