Project 10073 Record — Sioux City, Iowa, 25 February 1967

On February 25, 1967, two high school students in Sioux City, Iowa, observed three unidentified flying objects while they were in a field on the northern edge of the city. The witnesses, aged 16 and 17, reported that the objects were saucer-shaped with a round dome on top, approximately 12 feet in diameter, and appeared to be made of a dull, zinc-like metal with grooves on the flat bottom. The objects were observed at an altitude of 50 to 60 feet, traveling toward the northeast at approximately two-minute intervals. The witnesses reported no sound or exhaust. One of the witnesses took a Polaroid photograph of the third object. The incident was investigated by the 30th Air Division, and the report was forwarded to the Foreign Technology Division at Wright-Patterson Air Force Base. Photographic analysis conducted by the Air Force concluded that the image was genuine but lacked sufficient detail or scale reference to identify the object. The Air Force officially categorized the case as having insufficient data for evaluation, noting that the image was consistent with a circular object with some type of protrusion, but that no positive explanation could be made. Correspondence between the Air Force and the witnesses confirms that the original photograph was returned to the witnesses and that the Air Force maintained that there was no evidence in the photograph to indicate the object was extraterrestrial.