Why the U.S. military targeted Qassam Soleimani -- and how Iran might react

How is Iran likely to react to the American military strike that killed top general Qassam Soleimani -- and how well prepared is the U.S. to withstand that response? Karim Sadjadpour of the Carnegie Endowment for International Peace and retired Adm. Michael Mullen, former chairman of the Joint Chiefs of Staff, join Nick Schifrin to discuss Soleimani's role and how Iran will adapt without him.