Oct.04 - Facebook Inc. shares tumbled. The social-media company suffered a devastating outage that shut out many of its 2.7 billion global users. Apps, including the main social network, Instagram and WhatsApp, began to return online for some users about 5:45 p.m. New York time. Separately a whistleblower revealed herself for the first time and accused the social media giant of putting “profit over safety” of its users. Kurt Wagner reports on "Bloomberg Daybreak: Australia."