There is nothing to encourage. The Iranians should just stay away from us.

Daesh members wear shoes. Does this mean everybody who wears shoes is Daesh?

We have a legal system, and this is not something that happens all the time. We have capital punishment. America has capital punishment. Iran has capital punishment. Iran hangs people and leaves their bodies hanging on cranes. Iran put to death more than a thousand people last year. I don't see EU reporting on it.

Let's not forget: This all began when you had eight- and nine-year-old children writing graffiti on walls. Their parents were told: "You will never see them again. If you want to have children, go to your wife and make new ones." [Bashar] Assad's people rebelled. He crushed them brutally. But his military could not protect him. So he asked the Iranians to come in and help.

The Iranians know what they need to do in order to become a responsible member of the international community and in order to become a good neighbor, and it's really up to them to change their behavior.

Should the political process not work, there is always the other approach.

We believe that introducing surface-to-air missiles in Syria is going to change the balance of power on the ground. It will allow the moderate opposition to be able to neutralize the helicopters and aircraft that are dropping chemicals and have been carpet-bombing them, just like surface-to-air missiles in Afghanistan were able to change the balance of power there.