This unclassified June 2021 report, issued by the Office of Director of National Intelligence, was requested by the Senate Intelligence Committee. The Unidentified Aerial Phenomena Task Force found 143 sitings of phenomena that could not be readily explained.
After carefully considering this information, the UAPTF focused on reports that involved UAP largely witnessed firsthand by military aviators and that were collected from systems we considered to be reliable. These reports describe incidents that occurred between 2004 and 2021, with the majority coming in the last two years as the new reporting mechanism became better known to the military aviation community. We were able to identify one reported UAP with high confidence. In that case, we identified the object as a large, deflating balloon. The others remain unexplained.–Preliminary Assessment, Unidentified Aerial Phenomena
Read and download the report here.