Report on the Historical Record of U.S. Government Involvement with Unidentified Anomalous Phenomena (UAP), Volume I

The report states that AARO found no empirical evidence for claims that the USG and private companies have been reverse-engineering extraterrestrial technology. It determined that claims involving specific people, known locations, technological tests, and documents allegedly involved in or related to the reverse-engineering of extraterrestrial technology are inaccurate. AARO found no evidence that any U.S. government investigation, academic-sponsored research, or official review panel has confirmed that any sighting of a UAP represented extraterrestrial technology. All investigative efforts concluded that most sightings were ordinary objects and phenomena resulting from misidentification. Specific claims reviewed include the proposed but never-approved KONA BLUE program, which interviewees alleged was intended to cover up retrieval and exploitation of 'non-human biologics'; AARO determined it was a Prospective Special Access Program that received no materials, funding, or approval. An alleged 1961 Special National Intelligence Estimate suggesting extraterrestrial UFOs was assessed as inauthentic. A sample claimed to be from an off-world spacecraft was analyzed and found to be a manufactured terrestrial magnesium-zinc-bismuth alloy.