Russian Misinformation Is "A Military Assault” on the West

In Russia, access to social media sites like Facebook and Twitter is now restricted. But Carole Cadwalladr says that trying to ban information is “like trying to ban oxygen.” A journalist for The Guardian, she exposed the harvesting of personal Facebook data for political campaigns. Cadwalladr speaks with Hari Sreenivasan about Putin’s information war on Ukraine and the West.