Temporary ATIC Form 329 - Tempe, Arizona Sighting

This document consists of two pages related to the investigation of unidentified aerial phenomena under the auspices of Project Grudge. The first page is a Temporary ATIC Form 329, dated April 28, 1949, documenting a civilian sighting that occurred in Tempe, Arizona, in July 1947. The report describes a single silver, disc-shaped object, estimated to be 24 to 30 inches in diameter. The witness reported that the object exhibited high speed and varied altitude, performing maneuvers that included descending and ascending at a 45-degree angle before speeding away. The form notes that there were no photographs or sketches provided and explicitly states 'No case in file'. The second page is an 'Incident Index' containing Dr. Hynek's evaluations extracted from the Project Grudge report. This index categorizes various incident reports into groups based on the likelihood of astronomical explanations, suggestions of balloons or ordinary aircraft, rockets, flares, or falling bodies, and miscellaneous phenomena such as auroral streamers or birds. A significant portion of the index lists incidents where the lack of evidence precluded an explanation or where the evidence offered suggested no explanation.