Robert Haas : Nuclear deal will strengthen Iranian security at home . For starters , Iran remains the world 's most aggressive state sponsor of terrorism , as our State Department continually attests , fueling the murderous efforts of Hezbollah , Hamas , Palestinian Islamic Jihad , and other groups that have killed Americans , Europeans , Israelis , and others . Nothing of late in Tehran will change for better after a nuclear deal , he says .
Robert Haas : Nuclear deal will strengthen Iranian security at home . Nothing of late in Tehran will change for better after a nuclear deal , he says .