Aug. 28, 1963: Hundreds of thousands of demonstrators walk down Constitution Avenue during the March on Washington for Jobs and Freedom. In his new book Nobody Turn Me Around, Charles Euchner chronicles the peaceful civil rights demonstration though the stories of people who were there. Hulton Archive/Hulton Archive hide caption

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David and Julia Koch attend the opening night celebration of the New York City Ballet at the David H. Koch Theater, Lincoln Center, on Nov. 25, 2008. Andrew H. Walker/Staff/Getty Images hide caption

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Moses (right), a gay Ugandan man seeking asylum in the United States, hides his face with a makeshift hood as he attends a press conference in Washington, D.C., in February. The press conference was organized to announce the formation of an event to "affirm inclusive values and call on all nations, including Uganda, to decriminalize the lives of gay, lesbian, bisexual and transgender people." Jewel Samad/AFP/Getty Images hide caption

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More than half of the world's Muslims live along the 10th Parallel; so do most of the world's Christians. It's a place where ideological -- and geographic -- conflicts often arise. hide caption

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Jack Clark's pulp mystery was inspired by his years of driving customers around Chicago after hours. Courtesy Jack Clark hide caption

itoggle caption Courtesy Jack Clark

Caroline Richard Simon holds Elise Simon, 11 months old, on the day her adoption was approved by Chinese officials in Nanchang. Courtesy of Scott Simon hide caption

itoggle caption Courtesy of Scott Simon