Facebook Inc. Chief Executive Officer Mark Zuckerberg and co-founder has set a gold standard of corporate responsibility by falling on his sword for the mistakes of his colleagues. In a prepared testimony for the U.S. House of Representatives, he said all of Facebook's problems are his mistake. Zuckerberg is due to testify to Congress on Tuesday and Wednesday as the world's most popular social media platform faces the worst privacy crisis in its history. He will try to explain how much Facebook contributes to the world while saying he didn't take a broad enough view of the consequences of the company's technology. "It was my mistake, and I'm sorry," Zuckerberg added, according to a copy of the prepared testimony ahead of his appearance in front of the House Energy and Commerce Committee on Wednesday. "I started Facebook, I run it, and I'm responsible for what happens here." The prepared testimony recounts many of the updates Facebook has made to improve security since revelations that Cambridge Analytica, a political consultant with ties to President Donald Trump's campaign, obtained information on as many as 87 million users without their consent. It also confirms Facebook knows little about what Cambridge Analytica did with the data, or even whether it still has the information. Facebook's timeline about the incident relies on outside news reports, not the Menlo Park, California-based company's own investigation. "I've directed our teams to invest so much in security -- on top of the other investments we're making -- that it will significantly impact our profitability going forward," Zuckerberg said in the prepared testimony. "But I want to be clear about what our priority is: protecting our community is more important than maximizing our profits."