Mr. Allison-
I heard the show and was dumb-struck when you started talking about the situation in Minneapolis/St. Paul. By way of introduction, I was living in Mpls, near Lake Harriet at the time and saw the thing too.
From my vantage point, in what would be the western part of the metro area, the thing was clearly visible and stationary in the East for the entire time, which I believe to be days.
While the article would lead one to believe that its appearance was over in the course of a single day, if I remember correctly, it was there for "days" and illuminated at night. I saw it repeatedly in my travels around the city.
The strangest thing about the whole damn thing, and I'm not looking for spooky organ music in the background here, is that nobody seemed to care! I'd been fascinated by the whole idea of sightings for 30 years but didn't really get wound up about this very visible "thing" sitting over a metro area. No one did. . .
My wife brought it up couple of weeks before your appearance on the show. "Remember when that silver ball was sitting over St Paul?" Yes- I bet a lot of people in the Twin Cities do.