Washington, Mar 22: "I m really sorry that this happened," the Facebook (FB) CEO told to media here on Wednesday.We have a responsibility to protect your data, and if we can t then we don t deserve to serve you," Zuckerberg said, in his first public comments on the harvesting of Facebook user data by a British firm linked to President Donald Trump s 2016 campaign. Writing on his Facebook page, Zuckerberg announced new steps to rein in the leakage of data to outside developers and third-party apps, while giving users more control over their information through a special toolbar. Zuckerberg addressed the scandal publicly through a Facebook post on Wednesday. He wrote that the company made "mistakes" and outlined how it has changed its policies to make sure that user data is protected."I wish we d taken those steps earlier," Zuckerberg told Segall. "That ... is probably the biggest mistake that we made here."