Facebook has said sorry for a major outage which saw 3.5 billion people unable to access its apps and services.
The social media platform went down yesterday, along with Whatsapp, Instagram and Messenger.
The company insists it was due to an internal technical issue - and that there's 'no evidence user data was compromised'.
The outage resulted in owner Mark Zuckerberg’s own personal wealth falling by more than $6bn.
Technology Correspondent Jess Kelly says the issue highlights the power Facebook has.
"The key issue here is that the backend of Facebook is built and controlled by Facebook.
"So when one of them goes down, they all go down.
"Yes you have that reputational damage, but this is going to add fuel to the fire for the calls to break up Facebook."
