New filings show most UFO reports are simply foreign surveillance or airborne trash. A public report released last year revealed over one-hundred unexplained UFO incidents between 2004 and 2021, igniting theories about aliens from other planets. Now as intelligence agencies prepare to update that report to Congress on Monday, the New York Times reports most of these incidents are attributed to countries attempting to spy on the US, or things like weather balloons, commercial drones, and optical illusions.