Facebook Holds Its Fourth f8 Developer Conference

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Facebook CEO Mark Zuckerberg describes Facebook's new applications... News PhotoCalifornia,Facebook,Finance,Horizontal,Mark Zuckerberg,New,Press Conference,San Francisco - California,Social Networking,Technology,USAPhotographer Collection: AFP 2011 AFPFacebook CEO Mark Zuckerberg describes Facebook's new applications during a press conference at the Facebook f8 Developer Conference at the San Francisco Design Center on September 22, 2011 in San Francisco, California. AFP PHOTO/Kimihiro Hoshino (Photo credit should read KIMIHIRO HOSHINO/AFP/Getty Images)