Can Afghans stop Taliban advancements as the U.S. withdraws?

The U.S. will soon complete the troops' withdrawal from Afghanistan after 20 years of war. Nick Schifrin talks to the lead U.S. diplomat for the region, Ambassador Zalmay Khalilzad. Born in Afghanistan, he worked in various capacities with Presidents Ronald Reagan, George W. Bush and Donald Trump. He is currently the special representative for Afghan reconciliation under President Joe Biden.