The G20 security force included dozens of out of state police departments including the Chicago Police Dept.(which is now under investigation), the Border Patrol, Air Force (in riot gear!), & Army National Guard.

The government brought in 4LRADs, Apache attack helicopters, Blackhawks, Chinooks, and even guarded a Starbucks with at least one silenced MP5 sub-machine gun(during the permitted peacemarch).

There is a also a picture of firefighters apparently taking intelligence photos for the police.

It is also suspected that police were using new "face recognition" camcorder technology