Project 10073 Record: Hamilton AFB, California, 21 June 1950

On June 21, 1950, at approximately 1:35 A.M., three Air Force personnel stationed at Hamilton Air Force Base in California reported observing an unidentified aerial object. The witnesses, Corporal Garland Pryor and Staff Sergeants Ellis R. Lorimer and Virgil Cappuro, described a disk-shaped object that performed five passes over the base at an estimated speed of 1,000 to 1,500 miles per hour and an altitude between 2,000 and 5,000 feet. The observers reported that the object emitted a blue-green streak of flame, which one witness likened to the flame of a blow torch, and produced a sound described as a 'thunder-like roar.' Despite the witnesses' experience in control tower operations, the military's official position at the time was that no planes were over Hamilton Field during the pre-dawn hours. The official Project 10073 record for this incident is marked as 'Insufficient Data' because the primary case file and index card are missing. The military's assessment relies entirely on secondary sources, specifically four news clippings and an extract from a 'Flying Saucer' magazine. The document notes that the case remains open for evaluation should the original file be recovered.