For six hours on Monday, billions of people around the world could not use Facebook, Instagram or Whatsapp to communicate.
Facebook blamed a technical glitch for one of its worst outages in years.
It is the company's latest headache, after a former employee accused it of putting profits ahead of safety concerns.
So, has Facebook become too powerful? And are we too reliant on social media?
Presenter: Adrian Finighan
Estelle Massé - Europe Legislative Manager and Global Data Protection Lead, AccessNow.
Alp Toker - Founder of Internet monitoring organization NetBlocks.
Catalina Goanta - Assistant Professor in Private Law, Maastricht University.
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