Why social media giants are vulnerable to foreign propaganda

Social media giants Facebook, Twitter and Google came to Congress on Tuesday. More

Social media giants Facebook, Twitter and Google came to Congress on Tuesday to admit publicly that their platforms have a political dark side, and that Russia used them to try to manipulate how Americans voted. Nick Schifrin offers a recap of the hearing and Judy Woodruff takes a deeper look with Thomas Rid of Johns Hopkins University and Tim Wu of Columbia University.

AIR DATE 10/31/17