1 http://www.pdphoto.org/

     2 PDPhoto.org is a repository for public domain photos. Use the photos for

     3 anything, including commercial uses, other websites, school projects, articles,

     4 ads, whatever. Public domain means the photo is not protected by copyright and

     5 may be freely used by everyone. Unless something is clearly marked as being

     6 something other than public domain, you can assume it is free to use.