Barbara Harris founded Project Prevention after adopting four children born to a drug addict.
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The organization pays drug addicts $300 to be sterilized or receive long-term birth control.
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So far, the organization has paid more than 7,000 drug addicts to take part in the program.
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Project Prevention has been criticized for its slogans and its practices.
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Harris defends her mission, saying, "We don’t allow dogs to breed. We spay them."
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