Incident No. 1 - Unidentified Aerial Objects Sighting Report, 1 June 1949

This document comprises a series of investigation reports and correspondence regarding a sighting of an unidentified aerial object on 1 June 1949 in the vicinity of Stewart Field, Newburgh, New York. Multiple witnesses, including civilians and military personnel, reported observing an object in the sky between 1830 and 2130 hours. Descriptions of the object varied, with witnesses describing it as yellowish-white, shiny, and having shapes ranging from an inverted exclamation mark to a snake or a chain-like structure with balls of fire. The object was observed moving slowly, often in relation to the moon, and was described as having a luminosity comparable to several 40-watt bulbs or a bright yellow light. One witness, using binoculars, reported seeing rainbow-like colors and hearing a sound resembling an airplane followed by a rifle shot, after which the object disappeared. The investigation was conducted by the 4400th Air Base Group at Stewart Field. The reports were forwarded to the Commanding General of the Air Materiel Command at Wright-Patterson Air Force Base. In an endorsement dated 30 June 1949, the Air Materiel Command concluded that the phenomenon bore a marked similarity to meteorological or upper air research balloons. The report noted that Stewart Field facilities were occasionally used by New York University for the release of such balloons. The documentation includes individual 'Guide to Investigation' forms for several witnesses, detailing their observations, the weather conditions (which were consistently reported as clear and cloudless), and the interrogator's assessment of the witnesses' character, which was generally rated as good or excellent. The final record, identified as Project 10073, summarizes the incident as a balloon sighting. The correspondence reflects the standard military procedure for investigating such reports during the period, emphasizing the need to check for local weather and research agency activity to determine if the sightings could be explained by balloon operations.