David Grusch, a former member of a U.S. Air Force panel on unidentified anomalous phenomena, said the U.S. government has been concealing a defense program that collects and reverse engineers UFOs.

A top Pentagon official has attacked this week’s widely watched congressional hearing on UFOs.

A former Air Force intelligence officer has testified that the U.S. is concealing a longstanding program that retrieves and reverse engineers unidentified flying objects.