10,000 security personel at the Super Bowl

Drudge is reporting that there will be 10,000 people involved in securing the Super Bowl in Detroit:

Detroit police and the FBI will unveil an unprecedented security plan Tuesday for Super Bowl XL -- an effort by more than 50 federal, state and local agencies across Metro Detroit that tops all other preparations.

The DETROIT NEWS will report: "Including private security guards, we'll have upwards of 10,000 people involved," said William Kowalski, the assistant special agent in charge of the Detroit FBI.

Canada and the United States are still negotiating the extent of a "no-fly zone" during the game. This is the first Super Bowl to take place so close to an international border.

Dozens of security cameras and an FBI command center that will be staffed 24 hours a day for the entire week preceding the game and during it. SWAT teams -- aided by digital maps covering every inch of Ford Field -- will be at the ready.

I'm sure that there is a ton of concern about the proximity of Ford Field to Canada, but can anyone else think of another reason that the FBI may be concerned about a Super Bowl in Detroit? This other reason seems like the elephant in the room to me, but I'm curious if anyone else is thinking about this as well. I'll give you a hint: Think demographics.