This video, sent to us by an Unknowncountry reader, shows a strobing light directly over the Gateway Arch in St. Louis. It is too stationary to be a hovering drone or a passing plane, so it is a genuine unknown. UPDATE 8/4/16: Additional surveillance video posted on Facebook suggests that this is probably a drone with a strobe light on it. We downgrade it to B, possible unknown.
In May, a photograph was taken of a blue light over the arch. This was thought to be a sun dog, and does have that appearance, but in view of the new sighting, perhaps not. Also in May, photos of something unusual were taken over a St. Louis Cardinals game.
If you live in the area and see anything or get any videos or photos, please let us know at Whitley@strieber.com.