UFOs have come to Washington again — this time, in a newly released tranche of more than 150 previously classified documents that cover nearly 80 years of alleged sightings. Available to read today (May 8) on the Department of Defense website , the 162 newly declassified documents, photos, and videos cover reports of UFOs and UAP (unidentified anomalous phenomena, the government's preferred name for such sightings today) dating back as far as 1947. "The materials archived here are unresolved cases, meaning the government is unable to make a definitive determination on the nature of the observed phenomena," DOD representatives wrote on the agency's website. "This can occur for a variety of reasons, including a lack of sufficient data." Are there any aliens? Due to the poor data quality, the reports do not contain any compelling evidence of alien intelligence.…