Slate has a photo-essay around one of Stanley Forman's images from the Boston school integration battles. There's a bit of backstory - how many people win a Pulitzer because they showed up late? - context, and comparison to other famous images.
(I love Google. I've just learned that Forman's third Pulitzer, shared with other staff photographers, was awarded for coverage of the blizzard of 1978. Sounds like the perfect complement to a review of My Latest Grievance.)