Supporters of a Pakistani traders group chanted slogans during an April 2008 rally to condemn the printing of Muhammad cartoons in Danish newspapers in Karachi, Pakistan. A Yale University book committee has refused to allow reprints of those cartoons in a book chronicling the controversy. Fareed Khan/AP hide caption

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Christopher Hitchens and Douglas Wilson debate whether religion is good for the world in Collision. hide caption

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Dalia Mogahed, one of 25 people tapped by President Obama to serve on an advisory council on faith-based issues. Mogahed may have met Obama only once, but to Muslims, she's a celebrity — thanks to the headscarf, or hijab, she wears every day. Coburn Dukehart/NPR hide caption

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