When Iranians took to the streets to protest an abrupt hike in gas prices, the government turned off the internet. When it came back on, the world saw the devastating aftermath of the deadliest crackdown in Iran since the 1979 revolution. 

Why was the crackdown so severe? And what role dis U.S. sanctions really play in bringing the protests about? Jen talks to Karim Sadjadpour about what the unrest means for the Iranian regime and for U.S. strategy.