An image of an Atlanta billboard with a caption that reads "Black Children Are An Endangered Species." hide caption

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First Nation aboriginals perform for International Olympic Committee President Jacques Rogge as he tours the Olympic Village in Vancouver this week. Mark Ralston/AFP/Getty Images hide caption

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John Rich is a professor at Drexel University School of Public Health. He was awarded a MacArthur Foundation "genius" fellowship in 2006. Courtesy of Dr. John Rich hide caption

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The four original participants in the Woolworth's lunch counter sit-in walk down the street after leaving the lunch counter on Feb. 1, 1960. The Woolworth's sit-ins continued for months and inspired sit-ins across the country, which helped change public opinion and led to the end of segregation. Jack Moebes/Corbis hide caption

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