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National UFO Reporting Center Sighting Report
Occurred : 8/18/2021 20:40 (Entered as : 8/18/2021 20:40)
Reported: 8/18/2021 7:34:39 PM 19:34
Posted: 8/20/2021
Location: St. Louis, MO
Shape: Fireball
Duration: 20 seconds
Characteristics: There were lights on the object, There was an aura or haze around the object
Green-light ball with a tail looks like a shadow was falling under 45 degrees for a 15-20! Seconds and disappears Was only one and doesn’t look like any fireworks or something similar.

When I googled “ufo green light” there is a picture looks exactly like what I saw with no explanation or definition