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National UFO Reporting Center Sighting Report
Occurred : 6/6/2015 21:45 (Entered as : 06/06/15 21:45)
Reported: 6/7/2015 5:33:22 AM 05:33
Posted: 6/15/2015
Location: Toronto (Canada), ON
Shape: Fireball
Duration: 30 minutes
Sorry to have troubled you.

After seeing pictures of sky lanterns, I think that must have been what we saw.