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National UFO Reporting Center
Sighting Report
Occurred : 8/28/2018 21:20 (Entered as : O8/28/2018 21:20)
Reported: 8/29/2018 8:29:25 AM 08:29
Posted: 8/31/2018
Location: Castro valley, CA
Shape: Circle
Duration:5 seconds
2 circular objects chasing each other in the northern skys