At least one in six people worldwide doesn't have access to clean water, and this contributes to about 1.5 million preventable deaths each year, according to the United Nations.

Doc Hendley, a top 10 CNN Hero in 2009, is trying to help change that. Through his nonprofit, Wine to Water, the former bartender from North Carolina has helped provide clean water to more than 150,000 people in 15 countries.

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