Incident #64 Sighting Report — Twin Falls, Idaho, 19 August 1947

This document details Incident #64, which occurred on 19 August 1947 in Twin Falls, Idaho. The report describes a sighting of numerous objects in the night sky by a policeman and other witnesses, including a detective from the Twin Falls Police Department. The witnesses reported seeing objects that emitted a glow similar to an electric light bulb and traveled at a 'terrific' speed. The objects were observed moving in a triangular formation, with some groups of objects peeling off from a larger group of ten. The witnesses explicitly stated that the objects were not birds and that the lights were not reflections of city lights. However, the official evaluation by the Air Materiel Command Aero-Medical Laboratory concluded that the incident had no astronomical basis. The official explanation provided is that the overcast sky conditions at the time could have allowed for signal or search lights to be reflected off the cloud background, creating the appearance of the observed phenomena. The document also includes index lists from the Project Grudge report, categorizing various incidents based on their evaluation, with Incident #64 being categorized under non-astronomical explanations involving potential reflections.