Zuckerberg discloses Facebook working with Russia probe

Life-sized cutouts depicting Facebook CEO Mark Zuckerberg wearing “Fix Fakebook” T-shirts are displayed by advocacy group, Avaaz, on the South East Lawn of the Capitol on Capitol Hill in Washington, Tuesday, April 10, 2018, ahead of Zuckerberg’s appearance before a Senate Judiciary and Commerce Committees joint hearing. (AP Photo/Carolyn Kaster)

Chart visualizes the amount of Facebook active users to those that took a quiz, compromising their data their friend’s data.

Facebook CEO Mark Zuckerberg testifies before a joint hearing of the Commerce and Judiciary Committees on Capitol Hill in Washington, Tuesday, April 10, 2018, about the use of Facebook data to target American voters in the 2016 election. (AP Photo/Carolyn Kaster)

WASHINGTON — Facebook CEO Mark Zuckerberg disclosed Tuesday his company is “working with” special counsel Robert Mueller in the federal probe of Russian interference in the 2016 presidential campaign — and working hard to change its own operations after the harvesting of users’ private information by a Trump campaign-affiliated data-mining company.