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CBSNews.com's Ken Lombardi speaks with Alicia Keys, Tyra Banks, David Arquette, and Richie Sambora about Keys' charity, Keep A Child Alive, and it's 2011 Black Ball for stars to raise funds for children affected by HIV and AIDS in India and Africa.

In Thienaba, Senegal, David Arquette discovers that preventing malaria doesn't always require high-tech solutions.