5 Things We Learned From Mark Zuckerberg During Day 1 of His Congressional Testimony

This afternoon, Facebook CEO Mark Zuckerberg spent several hours answering questions from dozens of U.S. senators in Washington, D.C. The questions varied from explaining the basics of ad-tech to answering whether Facebook would support bills strengthening privacy laws. Zuckerberg's testimony before Congress comes nearly a month after Facebook banned the British data firm Cambridge Analytica...