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National UFO Reporting Center Sighting Report
Occurred : 12/6/2013 02:00 (Entered as : 12/6/2013 2:00)
Reported: 12/6/2013 1:15:56 AM 01:15
Posted: 12/12/2013
Location: American Fork, UT
Duration: 1 second
Characteristics: The object changed color
A green light lit up the entire sky for about two seconds, then a smaller blue light flashed.

Looked like it came from eastern Salt Lake Valley.