Preliminary Assessment: Unidentified Aerial Phenomena

This document comprises a response from the Office of the Director of National Intelligence (ODNI) to a Mandatory Declassification Review (MDR) request submitted by John Greenewald, Jr., regarding the classified version of the 'Preliminary Assessment: Unidentified Aerial Phenomena' report provided to Congress in June 2021. The document includes the official correspondence and the declassified assessment itself. The assessment, prepared by the Unidentified Aerial Phenomena Task Force (UAPTF), details the challenges in evaluating UAP due to limited and inconsistent data. The UAPTF analyzed 144 reports from U.S. Government sources between 2004 and 2021. The report concludes that while most UAP likely represent physical objects, the data is insufficient to draw firm conclusions about their nature or intent. The UAPTF categorized potential explanations into five groups: airborne clutter, natural atmospheric phenomena, USG or U.S. industry developmental programs, foreign adversary systems, and a catchall 'other' category. The assessment highlights that UAP pose a safety of flight risk and potentially a national security challenge, particularly if they represent foreign collection platforms or breakthrough technologies. The report emphasizes the need for standardized reporting, increased data collection, and further investment in research and development to better understand these phenomena. It also notes that the UAPTF has begun interagency efforts to improve data consolidation and analysis.