This doesn't have anything to do with legal research, or law school, or computers in libraries... but what the heck, it's the weekend.
Here's a blogposter (the Daily Planet) that shows images that changed the world. Here's another blogpost titled "13 photographs that changed the world" (from Never Give Up) with some of the same, some different. As the author says, "Any picture can speak 1,000 words, but only a select few say something poignant enough to galvanize an entire society. " And another one (Pinguys website).