George AFB, CaliforniaMay 1952

Five white, disc-shaped objects flew over George Air Force Base in Victorville, California, on May 1, 1952. Multiple military witnesses observed the objects for about fifteen to thirty seconds around 1050 hours (10:50 a.m.) Pacific Daylight Time.

The objects were dull white or silvery in color and perfectly round in shape. They moved in formation, with three flying together in front and two weaving and darting around behind them in circular, zigzag patterns. Observers noted they moved at speeds far greater than jet aircraft of the era, gave off no sound, left no exhaust or vapor trail, and showed no reflection of sunlight. The objects made a sudden right turn and disappeared rapidly.

Witnesses included military personnel stationed at the base. One observer was the Wing Director of Personnel. Others were stationed at a control tower on the firing range. From their vantage points, witnesses estimated the objects were six to seven miles away, flying at an altitude above five thousand feet in a north-northwest direction. All observers agreed on the basic descriptions despite viewing from different locations.

On May 21, 1952, a Project Blue Book investigator visited George Air Force Base to look into this sighting and several others that had occurred in a three-week period. During that visit, ground observers using a telescope spotted what appeared to be a balloon, which investigators later confirmed was a rawinsonde (a weather balloon used to measure conditions in the upper atmosphere) released from Edwards Air Force Base that had burst at an extremely high altitude. However, the official Air Force evaluation for the May 1 sighting itself remained unidentified, noting insufficient data for a conclusive explanation.

The full case file, comprising 45 pages, is reproduced below as held by the National Archives.