Could this be the reason????
National UFO Reporting Center
Sighting Report Occurred : 9/11/2010 22:30 (Entered as : 9-11-2010 22:30)
Reported: 9/12/2010 8:08:38 PM 20:08
Location: Shoreview, MN
Duration:5+ hours round bright circling orb around tower
My family and I were out in the yard playing under our outside lights and noticed a bright circle of light moving in short bursts getting closer and closer to the tv/radio towers known as the Shoreview towers.
The light was weaving in and out of the cables and finally right next to the tower circling it and then moving out slowly and slightly up and down.
We watched for a couple of hours and then periodically up to about 3:30am.
The light or orb would have moved away further every time we checked.
I went to bed and looked for any evidence of anything that might be of explanation the next morning.
The sky was clear and blue and no sign of anything hanging around the tower or it's cables.
I have never seen anything like what we experienced and felt compelled to share our experience.