[UPDATE – 19:15Z] Facebook is Down, Along with Instagram, WhatsApp and Messenger Since 15:45Z

Just as Facebook’s Antigone Davis was live on CNBC defending the company’s policies and its handling of research data suggesting Instagram is harmful to teens, its network of services suddenly went offline. [UPDATE – 19:15Z] Facebook employees reportedly can’t enter buildings to evaluate the Internet outage because their door access badges weren’t working *** On Twitter, Facebook communications exec Andy Stone says “We’re aware that some people are having trouble accessing our apps and products. We’re working to get things back to normal as quickly as possible, and we apologize for any inconvenience.” We’re aware that some people are having…