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National UFO Reporting Center
Sighting Report
Occurred : 5/18/2017 00:00 (Entered as : 05/18/2017 0:00)
Reported: 5/18/2017 6:30:33 AM 06:30
Posted: 6/2/2017
Location: Des Plaines, IL
Shape: Unknown
Just about every night, there is a loud sound coming from the sky it gets loud the it decreases in sound. Sometimes it goes for hours.

((NUFORC Note: Source of the report elects to remain anonymous; provides no contact information. Possible sighting of a celestial body?? PD))