I was at Michigan stadium for the Mi Mi state game. I noticed 10 men in black on the roof. They were not Mi state police they appeared to be homeland guys. I have been to many games and never have I seen so many men on the top. I also noticed much tighter security at the Lions game on Sunday including frisking every person.
You're absolutely certain this wasn't in preparation for the heavily promoted UFO sightings on the 13th?