Tech CEOs from Google, Twitter and Facebook testify at Senate hearing.

CEOs from Facebook, Google and Twitter testified before the Senate Commerce Committee on the importance of the law known as Section 230, which protects social media companies from liability for content published by platform users. CNET senior producer Dan Patterson and Wall Street Journal congressional reporter Siobhan Hughes join CBSN to discuss the battle over social media networks, censorship and free speech on their platforms.

Watch video on channel "CBS News"