Facebook Holds Its Fourth f8 Developer Conference

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Facebook Chief Operating Officer Sheryl Sandberg talks to an attendee... News PhotoCOO,California,Facebook,Finance,Horizontal,San Francisco - California,Sheryl Sandberg,Social Networking,Talking,Technology,USAPhotographer Collection: AFP 2011 AFPFacebook Chief Operating Officer Sheryl Sandberg talks to an attendee during the Facebook f8 Developer Conference at the San Francisco Design Center September 22, 2011 in San Francisco, California. AFP PHOTO/Kimihiro Hoshino (Photo credit should read KIMIHIRO HOSHINO/AFP/Getty Images)