20 years since the Chernobyl nuclear plant accident, and 400 times the radiation of Hiroshima fell upon the Ukranian towns and countryside near the plant, slowly for ten days.
This is a compelling photo-essay about what has happened since, entitled Chernobyl Legacy by Paul Fusco. You must click on the left-hand side to view it on flash player, but it can also be seen on the MSN/Slate site here, however it was very choppy when I tried it, so good luck.
The frightening thing about Chernobyl is that it was an accident, resulting from human error and carelessness. Scary to think what could happen here or anywhere for that matter, if someone were to intentionally do something or another accident occurred.