Facebook Holds Its Fourth f8 Developer Conference

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Facebook Vice President of Product Chris Cox explains some details of... News PhotoApplying,California,Close-up,Explaining,Facebook,Finance,Horizontal,Keynote Speech,New,Public Speaker,San Francisco - California,Social Networking,Technology,USA,Vice PresidentPhotographer Collection: AFP 2011 AFPFacebook Vice President of Product Chris Cox explains some details of Facebook's new application Open Graph during a keynote at 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)