MIAMI FLA, July 1952 - Incident Number: [ILLEGIBLE]July 1952

On July 10, 1952, a civilian yard worker in Miami, Florida, watched a transparent, greenish object about five feet across move slowly south of his position at roughly 435 feet above the ground. He initially thought it was below the clouds, but as he watched, it passed into or behind a cloud and disappeared, never to reappear. The observation lasted about ten seconds. The witness later called the object a "flying saucer," had observed it for approximately one minute total, and noted that it moved from south of him to almost due west. The object made no sound and showed no visible propulsion system, though the witness concluded it was propelled.

A weather balloon released about five miles north of the witness's location could not account for the sighting. The winds at the time were fairly strong, blowing from the east and east-southeast, and would have carried a balloon to the south. Instead, the object moved in a direction opposite to the wind. The witness was a former employee of an airline and was accustomed to observing aircraft of all types, which suggested his description of what he saw was accurate.

The Air Force's evaluation of this case appears incomplete in the available OCR text, and many pages of the case file are too garbled or sparse to support reliable transcription. The full Project Blue Book case file on the Miami July 1952 sighting is reproduced below as it is held in the National Archives, spanning 84 scanned pages.