'That Was A Mistake, I'm Sorry': Facebook Boss Apologises

Facebook chief Mark Zuckerberg will say sorry to the European Parliament on Tuesday, pledging that the social media giant has learned hard lessons from a massive breach of users' personal data.

Zuckerberg's comments, released in advance of the hearing in Brussels, are the latest part of a tour of contrition over the Cambridge Analytica scandal that began in the US Congress in April.