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 or 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 assessed that alleged hidden UAP reverse-engineering programs provided by interviewees either do not exist, are misidentified authentic national security programs unrelated to extraterrestrial technology, or resolve to disestablished programs. It further notes that experimentation on an alleged extraterrestrial spacecraft sample acquired from a private UAP organization and the U.S. Army concluded it was a manufactured terrestrial alloy with no exceptional qualities or off-world origin. Specific claims, such as a 1961 Special National Intelligence Estimate on UFOs, were assessed as not authentic. The report addresses third-hand accounts of organizations possessing multiple recovered spacecraft and non-human biologics prior to 1970 but found no verifiable evidence supporting these narratives.