UFO Observation Report — Dayton, Ohio, May 3, 1967

This document contains a U.S. Air Force Project Blue Book sighting report regarding an unidentified aerial phenomenon observed on May 3, 1967, in Dayton, Ohio. The primary witness, a graduate school instructor at the University of Dayton with prior U.S. Marine Corps experience and familiarity with aircraft, reported observing a single object for approximately 40 minutes. The witness described the object as a white light that pulsated and gradually changed colors, specifically shifting to green, blue, and red. The witness compared the appearance of the object to an aircraft making a landing approach at a high altitude, estimating its height at approximately 20,000 feet. The observation occurred under clear, dry weather conditions at night. The witness reported that the object did not make any sound and eventually moved away gradually. The report includes a formal letter from the Foreign Technology Division (FTD) at Wright-Patterson Air Force Base, dated May 11, 1967, informing the witness that the information provided was insufficient for a scientific evaluation and requesting the completion of an FTD Form 164. The internal project record notes that the sighting was reported to the FTD Staff Duty Officer, Captain Clyde P. Raleigh. The official conclusion reached by the Air Force was that there was insufficient data to identify the object, noting that if the indicated direction had not been northeast, it might have been attributed to an astronomical phenomenon.