I am part of a college based campus called Students for Life and I find that we are constantly in need of making banners and posters that convey social and political messages. One of the crucial aspects of making these posters is constantly finding clip art, vector designs, political cartoons and a lot of other things that we can successfully make use of for the purposes of our banners and posters. The problem is that it is quite difficult finding websites that offer public domain photos of these sorts. This is most definitely true of political cartoons and photos and pictures of good quality. I was wondering if anyone knew of any placed that offered these types of things in the public domain and preferably not needing to provide attribution. I would prefer a website that offers a good variety or at least something focused on social and political aspects as well as medical.