Project 10073 Record — Casa Grande, Arizona, 4 August 1965

This document contains the official Project Blue Book record for a UFO sighting reported on 4 August 1965 in Casa Grande, Arizona. The witness, a civilian member of the Civil Air Patrol and the local Chamber of Commerce, reported observing a white light that split into two round objects. The witness described the objects as being approximately the size of a green pea (later estimated at 1/4 inch each) and noted that they traveled from the southeast to the northwest at an altitude of approximately 6000 feet. The observation lasted for 7 seconds. The witness reported hearing a sound resembling rolling thunder or a distant locomotive, which had a slow frequency. The witness also noted that the objects appeared to be in formation after splitting and that there was no smoke or contrail. An aircraft was observed approximately 5 miles to the northeast after the objects disappeared. The report includes a follow-up letter from Major Hector Quintanilla, Jr., Chief of Project Blue Book, dated 22 December 1965, addressed to the witness, informing him that the case contained insufficient data for evaluation and requesting that he complete an attached FTD Form 164. The document includes technical details of the sighting, weather conditions (clear, calm winds), and the witness's background, noting he was considered a reliable individual.