Abraham Lincoln Brigade Memorial. San Francisco. Detail from the memorial. it was dedicated on March 30, 2008 and is the first such memorial in the US.
(View much more of it full-sized on Flickr.)
I took this photo at the 2004 RNC protest march in NYC. At least NYPD mostly respected freedom of speech and assembly unlike Twin Cities police currently at RNC 2008, who clearly haven’t a passing acquaintance with the concepts.