We all know a single moment can change everything. The things we fear, the way we spend, and the time we value can all change in a second. The question is: What moments are big enough to change the way we operate as a country? The threat of nuclear disaster in Japan may change our conversations about nuclear power, but as Michael Hirsh writes in this week's National Journal magazine, it probably won't provoke Washington to change policy.
We take a look at the disasters—both natural and man-made—that led to real reform.
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