The ALS Ice Bucket Challenge takes over the world

he rules of the Ice Bucket Challenge are simple: either donate $100 to an ALS charity, or dump a bucket of ice water on your head (or both, if you're sporting). After, you can challenge a few people to join in, too. ALS advocate Pete Frates posted a video that went viral, and in a blink, celebrities, athletes, and tech CEOs all started taking part, raising millions of dollars in the process.

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