These are from Saturday, January 22nd 2011 in San Francisco, CA. There were two groups of protesters here - the Walk for Life (pro-life) group, and a mixed group of counter protesters. You can choose to look at either group, or a video that bounces between their marches (side by side, with police in-between).
If you can't see the video or would like to see it larger, here's the direct link. (Note: a counter-protester used a naughty word in the first few seconds.)
You can contact me at info (at) ProtestShooter.com