Rep. Joe Barton, R-Texas, right, questions Facebook CEO Mark Zuckerberg as he testifies before a House Energy and Commerce hearing on Capitol Hill last week.
Rep. Joe Barton, R-Texas, right, questions Facebook CEO Mark Zuckerberg as he testifies before a House Energy and Commerce hearing on Capitol Hill last week. Andrew Harnik AP
Rep. Joe Barton, R-Texas, right, questions Facebook CEO Mark Zuckerberg as he testifies before a House Energy and Commerce hearing on Capitol Hill last week. Andrew Harnik AP