Mark Zuckerberg apologized on Wednesday evening for his company’s handling of the Cambridge Analytica privacy scandal. “This was a major breach of trust, and I’m really sorry this happened,” he said in an interview on CNN. “Our responsibility now is to make sure this doesn’t happen again.”

Zuckerberg’s comments reflected the first time he apologized following an uproar over how Facebook allowed third-party developers to access user data. The CEO and company founder undertook a rare media tour with a handful of outlets, including Verge sister site Recode, to explain the company’s perspective on a scandal that has consumed the company since Friday.

Earlier in the day, Zuckerberg wrote a Facebook post in which he said the company had made mistakes in its handling of the Cambridge Analytica data revelations. The company laid out a multipart plan designed to reduce the amount of data shared by users with outside developers and said it would audit some developers who had access to large troves of data before earlier restrictions were implemented in 2014.

Zuckerberg spoke with CNN senior tech correspondent Laurie Segall, with the segment airing during Anderson Cooper 360. The news came at a crucial moment for Facebook as it reels from the fallout of Cambridge Analytica data privacy scandal.

Other highlights of Zuckerberg’s interviews: