EghtesadOnline: Facebook Inc.’s Chief Operating Officer Sheryl Sandberg briefed U.K. Home Secretary Amber Rudd on the social network’s counter-terrorism efforts Friday, the company said in an emailed statement describing the meeting as "constructive."

EghtesadOnline: U.K. Home Secretary Amber Rudd said Facebook Inc.’s WhatsApp messaging system should open its encryption to security services and urged online companies to be more aggressive in shutting down sites exploited by terrorists.