Facebook CEO Mark Zuckerberg expressed contrition for allowing third-party apps to grab the data of its users without their permission and for being "too slow to spot and respond to Russian interference" during the US election, according to his prepared remarks published by the House Energy and Commerce Committee.

Zuckerberg plans to open his remarks with a familiar recitation of the social media platform's ability to link far-flung people together but then pivot into an acknowledgement of Facebook's increasingly visible dark side.