Facebook Holds Its Fourth f8 Developer Conference

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Facebook CEO Mark Zuckerberg delivers a keynote during the Facebook... News PhotoCEO,California,Facebook,Finance,Internet,Keynote Speech,Mark Zuckerberg,Press Conference,Public Speaker,San Francisco - California,Social Networking,Speech,Technology,USA,VerticalPhotographer Collection: AFP 2012 AFPFacebook CEO Mark Zuckerberg delivers a keynote during the Facebook f8 Developer Conference at the San Francisco Design Center in San Francisco on September 22, 2011 in California. AFP PHOTO/Kimihiro Hoshino (Photo credit should read KIMIHIRO HOSHINO/AFP/Getty Images)