Facebook CEO Mark Zuckerberg emphasized his company's mobile-centered future Tuesday, in his first public comments since Facebook's troubled IPO. Eric Risberg/AP hide caption

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President Obama joins in a toast with Technology Business Leaders at a dinner in Woodside, California, Feb. 17, 2011. Apple's Steve Jobs is to the president's left. Facebook's Mark Zuckerberg is to the president's right. Pete Souza/The White House hide caption

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Zuckerberg unveiled the privacy changes on Wednesday. Gabriel Bouys /AFP/Getty Images hide caption

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All Tech Considered

Zuckerberg: Sharing Is What Facebook Is About

The social site's founder says sharing information is a crucial part of Facebook's core mission.

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