
On November 7, 2006, multiple United Airlines employees—including pilots, mechanics, and supervisors—reported seeing a dark, disc-shaped object hovering silently over Gate C17 at Chicago O’Hare International Airport for several minutes.
Witnesses described the object as metallic, saucer-like, and motionless despite windy conditions, before it suddenly shot straight up at high speed, leaving a perfectly circular hole in the cloud layer above the airport that closed shortly afterward.

Air traffic control did not detect the object on radar. The FAA initially denied knowledge of the incident and later attributed it to a rare weather phenomenon, a “hole-punch cloud,” though witnesses maintained they saw a solid object prior to the cloud formation.
No official investigation results were released, and the incident remains unexplained, often cited as one of the most credible civilian UAP cases due to the number and expertise of the witnesses and its occurrence in controlled airspace.
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