Declassified CIA Files: Soviet 'Perm Triangle' UFO Broadcasts, a Saucer-Shaped Thermoplane, a Secret Soviet UFO Lab, and a One-Line Cusco Sighting

Eighteen declassified CIA-released documents, all preserved through The Black Vault's CIA collection, offer a paired lesson in how saucer-like craft and anomalous claims entered official U.S. government files for entirely conventional reasons. Seventeen were analyzed previously: FBIS-style broadcast monitoring logs and daily reports from 1990 through 1993 whose anomalous-adjacent items include a 'perm triangle' sighting, a saucer-shaped Soviet airship called a 'thermoplane,' a listener question about UFO activities in Britain, a Turkish-language letter on UFO research in the USSR, repeated references to the Soviet magazine 'UFO and Us' and a Moscow almanac titled 'We and UFOs,' a 'Moscow Mailbag' mention of a 'latest ufo signing in gulf of finland,' a Boris Belitskiy segment on circles in British fields, and a single-line report of a UFO sighting in Estonia described by a milkman and a passenger in his van.

The eighteenth and newly added document, C05516730, is a CIA FBIS 'TAKE'…