Well done. I wasn't expecting things to go so well with the NATO summit. But they did. Kudos to Police Superintendent McCarthy and all the men and women of the Chicago Police Department. Lesson can be learned (particularly by West Coast police departments that don't seem to be so good at this) and proper preparation is key.
1) Don't tolerate minor disturbances. Because they will grow to big disturbances, especially when those disturbances are perpetrated by people intent on chaos and damage. And once you lob the tear gas, you've already lost control.
3) Target individuals who are doing things and not the crowd en mass.
4) Have the top brass out there with the rank-and-file. This seemingly minor point is vitally important. And when a good word about McCarthy comes from the lips of Second City Cop, you know he's done something right.