For about 145 years, the world has had both the medium of photography and the service of the Red Cross. Now there's a traveling exhibition that documents both, and it's making a stop at Seattle City Hall. There are more than 80 images, taken during wartime, shot mainly by anonymous photographers, and with captions instead of titles. Together, they form a portrait of war since the dawn of photography. (City Hall Gallery, 600 Fourth Ave, 684-7171. Gallery open 7 am-6 pm, free. Reception on June 17 6 pm.)