FILE- In this Friday, Jan. 28, 2011, file photo, Sheryl Sandberg, Chief Operating Officer of the social network service Facebook, speaks during a panel session at the 41st annual meeting of the World Economic Forum, WEF, in Davos, Switzerland. Facebook announced Monday, June 25, 2012, it has named its No. 2 executive, Chief Operating Officer Sheryl Sandberg, to its board of directors. Sandberg, who joined Facebook from Google in 2008, is the first woman on Facebook's board of directors. (AP Photo/Keystone, Laurent Gillieron, File) Photo: Laurent Gillieron, Associated Press