The US is concealing a long-standing programme that retrieves and reverse-engineers unidentified flying objects, a former Air Force intelligence officer has told Congress.Retired Major David Grusch's highly anticipated testimony before a House Oversight sub-committee was Congress's latest foray into the world of UAPs - or "unidentified aerial phenomena" - which is the official term the US government uses instead of UFOs.

The US is concealing a long-standing programme that retrieves and reverse-engineers unidentified flying objects, a former Air Force intelligence officer has told Congress.Retired Major David Grusch's highly anticipated testimony before a House Oversight sub-committee was Congress's latest foray into the world of UAPs - or "unidentified aerial phenomena" - which is the official term the US government uses instead of UFOs.