From the Kettering Bug to Roswell: The Balance of Evidence and Secrecy in Aerial Phenomena

To the point

National security shapes what we observe about aerial mysteries, from the Kettering Bug crash to Roswell, with Kenneth Arnold and other witnesses sometimes at odds with officials and many sightings still unexplained.

Why the Pentagon Can’t Identify Flying Objects
slate.com

Why the Pentagon Can’t Identify Flying Objects

It’s not because they’re aliens, sorry!