Most of us have nowadays heard of the "Roswell Incident" in the U.S.A. in 1947. In those less paranoiacal times, despite the world having recently emerged from a catastrophic war, a sanguine view was still being taken about the possible presence of entities from other worlds, at least by the administrations of the United States of America and certain other countries including the United Kingdom. This seems to have hardened somewhat over the succeeding half century, although our kind are by and large no fools and are most fortunately still allowed to form our own judgments. Here follows a small, growing collection of public domain material for those interested, without any intended criticism or endorsement.

[End of document, updated to 10 June 2018]