Andrea Mitchell Reports 04/01/16

Protests erupt during Turkish Pres. visit in DC

President Barack Obama delivered an urgent warning to the Nuclear Summit about the possibility of ISIS terrorists going after nuclear material to build a dirty bomb. Former Senior Advisor at the U.S. State Department Vali Nasr talks to MSNBC’s Andrea Mitchell about the Summit and the protests that erupted during the Turkish President’s visit to D.C. ... more Duration: {{video.duration.momentjs}}