Facebook and its family of apps — including Instagram, WhatsApp, Messenger and Oculus — began flickering back online late Monday, after being down for more than five hours and disrupting the digital lives of billions of its users.
...
Facebook, Instagram, WhatsApp and other apps owned by the social network went down on Monday at around 11:40 a.m. Eastern time.
It was highly unusual to have so many apps go dark from the world’s largest social media company at the same time.
Facebook employees also were cut off from email, internal communication tools, and physical access to building sites because of the outage.
Well, what cause this? Were they mal'd or hacked?
