Microsoft President Brad Smith says governments need to set rules for big technology companies. "Almost no technology has gone so entirely unregulated, for so long, as digital technology," he says. Gary He/Reuters hide caption

District of Columbia Attorney General Karl Racine (left) and Texas Attorney General Ken Paxton speak Monday about the launch of an antitrust investigation into Google outside the Supreme Court in Washington, D.C. Mandel Ngan/AFP/Getty Images hide caption

Memorial event for Member of Parliament Jo Cox, of the Labour Party. Her murder by a man radicalized on the Internet prompted Parliament to examine digital threats to lawmakers, especially women in the United Kingdom. Dan Kitwood/Getty Images hide caption

Facebook CEO Mark Zuckerberg testifies before the House Energy and Commerce Committee on April 11, 2018. Andrew Harnik/AP hide caption

As part of a settlement with the Federal Trade Commission, Facebook CEO Mark Zuckerberg could be subject to penalties if his company doesn't comply with an agreement over privacy violations. Ben Margot/AP hide caption

U.S. lawmakers will question lobbyists and officials from Facebook, Google, Amazon and Apple on an array of issues. Reuters hide caption