While walking to another building for a lunch break, I and many other people saw this "craft" hovering over the city Of Rochester for 20 mins.

I realize that it has been many years since my sighting, but I wasn't comfortable coming out with this until now. Mainly because nobody beleived me who didn't witness this event.  I was working the "B" shift at The Eastman Kodak company at the time. As many of us were going to lunch, we walked to the ajacent building to the employee cafeteria. On our way over, we notice a guy looking up over towards downtown Rochester and pointing to an object in the sky. We were looking in a Easterly direction. There, about a mile or so away, about 2000 feet up was this sphere shaped object just hovering there. It wasn't possible to see any distinct color except for the changing color lights. It would change from green to red to amber. Sounds like a traffic light, but seriously, this thing was seen by scores of people. As others passed by, we pointed it out only to be teased and mocked. There were about 4 or 5 of us who stood there for at least 20 minutes and watched this out of pure facanation. The sky was clear and before sunset. All this object did was hover and didn't move at all. There were no other aircraft in the area. A short time later, the other employees were  returning from their lunch. Some looked at it and scoffed," Aw, thats just a balloon" and some other cheeseie explanations and continued back to work. At that point, I myself had to return to work because lunch was over. Needless to say, I never got my lunch, I was too facanated with what we were witnessing. When I got home, I called the local planetarium to see if they saw anything. They saw nothing. I KNOW what I saw along with 4 or 5 other people. Not to mention the many other skeptics. I looked up as I was walking up to my building and it was simply vanished. The others saw this too. When I tried to tell others about it, they all just laughed and because of this I never spoke of it again.