Been meaning to post this for quite a while - pictures from the March 18th, 2007 peace rally in Portland. I'll let the photos speak for themselves.

As an added bonus, here you can watch videos of the riot that ensued and the police response.
http://www.youtube.com/v/vcyz-RUcwGc
http://www.youtube.com/v/7G1NrBAl0SU
The girl in the video who was sprayed in the face was right: this is indeed what a police state looks like.