Facebook CEO Mark Zuckerberg speaks at the company's headquarters in Menlo Park, Calif., Thursday, April 4, 2013. Zuckerberg says the company is not building a phone or an operating system. Rather, Facebook is introducing a new experience for Android phones. The idea behind the new Home service is to bring content right to you, rather than require people to check apps on the device. (AP Photo/Marcio Jose Sanchez)

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