Boston, MassachusettsJune 1954

On a June morning in 1954, multiple witnesses in Boston, Massachusetts reported seeing an unusual aerial object that caught the attention of the U.S. Air Force. The object appeared milky and balloon-like in shape. Five or more people on the ground observed it together. The sighting lasted about five minutes.

The Air Force received a telephone report of the incident and sent out technical questionnaires to gather more details. The witnesses described the object as very high in the sky. Notably, the pilot of a nearby aircraft, likely from Grenier Air Force Base, which had released a weather balloon at 0430 hours (4:30 a.m.), believed the object was simply a balloon.

The investigation file itself is heavily degraded in the OCR process. While the cover sheet indicates the Air Force received 11 pages of documentation, much of the handwritten witness testimony and official notes have become largely illegible during scanning. The technical questionnaires included in the file contain standard questions about the object's appearance, movement, size, and weather conditions, but the answers provided by witnesses are difficult to read with confidence.

Despite the involvement of multiple observers and the initial report to military authorities, the Air Force could not definitively identify the object. The case was officially labeled as unidentified, though the pilot's assessment that it was a weather balloon suggests this may have been the most likely explanation. The full case file is reproduced below as held by the National Archives, comprising 11 scanned pages.