If you have seen photos of the civil rights battles in the U.S. in the 1960s, then you likely know the photographs of Charles Moore. The Lens Blog at the NYTimes.com has a write up of him and some of his photos, but what you really want to do is go here. At that site you will see many of the powerful photographs that he took of that era. That site is called Powerful Days, but it could equally be called Powerful Photographs.
This is just one of Moore’s photos. You want to see the rest.