Facebook was down for some hours, a couple of days ago due to some as yet undisclosed difficulty. Facebook and associated Zuckerberg entities fell off the internet. Here is some computer speculation that I could find. It is possible that there was an inside job done with someone inside Facebook causing the company to rescind key digital records that tell computers and other devices how to find the destinations online, thus knocking FB etc. off the internet. If so, was this a massive accident, or cyber-terrorism? Information is scarce at the moment, making the event highly suspicious. But, we may find out more down the track. It does show how vulnerable IT infrastructure is, but that is life now.