Daesh is attacking us. Their leader, Abu Bakr al-Baghdadi, wants to destroy the Saudi state. These people are criminals. They're psychopaths.

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.

There is a political process which we are trying to achieve through what is called the Vienna Group. That involves the establishment of a governing council, which is to take power away from Bashar Assad, to write a constitution and to open the way for elections. It is important that Bashar leaves in the beginning, not at the end of the process. This will make the transition happen with less death and destruction.

The war in Yemen is not a war that we wanted. We had no other option - there was a radical militia allied with Iran and Hezbollah that took over the country. It was in possession of heavy weapons, ballistic missiles and even an air force. Should we stand by idly while this happens at our doorstep, in one of the countries in which al-Qaida has a huge presence? So we responded, as part of a coalition, at the request of the legitimate government of Yemen, and we stepped in to support them.

If, as we decided in Munich, there will be a cessation of hostilities and humanitarian assistance can flow into Syria - then this will open the door for the beginning of the political transition process.

The Middle East has gone through periods of turmoil before. In the 1950s and 1960s, there were revolutions. When monarchies were collapsing in a number of countries, we had radicals and we had Nasserism. Today it's a little bit more complicated.

We don't tolerate terrorism. We go after the terrorists and those who support them and those who justify their actions.