Recent U.S strikes against Iranian proxy groups in Syria and Iraq may be just the beginning of a multi-tier response by the U.S. after the killing of three service members in Jordan last month and it's raising questions about just how far the U.S. should go in limiting Iran's ability to use these groups to launch attacks against Americans. Former CIA Deputy Assistant Director of the Near East Mission Center and former Chief of Analysis in the Iran Mission Center Andy Dunn talks to State Secrets about what it will take to deter Iran.