U.S. National Archives in The Commons at Flickr

The U.S. National Archives has joined The Commons at Flickr.  Their high resolution offerings feature photographs by Ansel Adams, Mathew Brady, lots of images from the EPA's DOCUMERICA project (1971-1977), and many more historical photographs and documents.  You can view their collections here.  As with all images in The Commons, these images carry no known copyright restrictions.

Image: Erik Calonius, Interior of Graffiti-Marked Subway Car, 05/1973. From the DOCUMERICA project. U.S. National Archives.  From Flickr, no known copyright restrictions.