This 1950 CIA Information Report from Chile discusses a German scientist's article theorizing that "Flying Discs" could be explained as a new type of aircraft based on aerodynamic principles developed in German research facilities during and after WWI, using rotating cylinders or gas-turbines to create lift through boundary layer manipulation, rather than conventional wings. A redacted version of this report has been available on CIA's public website.
This is one of 19 CIA records in the declassified archive, and one of 27 cases describing a disc/disk. It was published in Release 03 (6/12).
Evidence tiers describe the type of record (sensor capture vs. written report vs.
administrative file) · not a claim about its conclusions. UFO Papers reports only what the documents state.