Visual reconstruction and recovered media extracted from the incident dossier. This case includes still evidence and analytical reconstruction.
Representative official gallery image traced to an official public-source archive
Chicago experienced a major 45-minute mass sighting one day before the famous Ann Arbor wave. O'Hare Airport tower confirmed multiple disc-shaped contacts. Chicago Police received over 500 calls. The FBI's Chicago field office conducted a parallel investigation to the Air Force Blue Book inquiry.
On April 5, 1966 — one day before the famous Ann Arbor–Dexter Michigan and Portage County Ohio events — Chicago experienced a major mass sighting lasting 45 minutes. Over 500 civilian calls flooded Chicago Police Department. O'Hare Airport tower controllers confirmed multiple disc-shaped radar contacts at 1,000 to 5,000 feet altitude in controlled airspace. Multiple CPD units observed the objects visually. The discs were described as approximately 60–100 feet in diameter, metallic, and moving in loose formation before executing coordinated maneuvers. O'Hare ATC filed a NOTAM and contacted Air Defense Command. The FBI's Chicago field office, operating under the Bureau's standing reporting protocol for disc sightings near major population centers, conducted a parallel investigation to the USAF Blue Book inquiry. The cross-referencing of the Chicago case with the Ann Arbor events the following day suggested to investigators that the wave was moving eastward across the Great Lakes region.
This incident is indexed as file FBI-B11-002inside Now Declassified's research layer. The nearest official source trail for this agency points to FBI Vault, where archive records, imagery, or supporting context are published for public review.
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Materials recovered near Roswell, NM. A hexagonal disc approximately 20 feet in diameter was documented, suspended from a balloon. Modern re-analysis notes 'composition inconsistent with known terrestrial alloys'.
FBI Photo B20: an infrared still of an unidentified craft hovering at under 1,000 ft for 45 minutes. Object defied wind conditions and maintained perfect stationary position with no discernible propulsion.
Socorro police officer Lonnie Zamora observed a white oval craft with red insignia resting on legs in an arroyo, attended by two figures in white. He observed the craft take off with a roaring flame, become silent after 20 feet, and depart at high speed. Physical evidence — burned vegetation, soil compression, metal scrapings — was immediately confirmed by State Police and Army investigators. Project Blue Book listed this as 'unknown.'
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