We try to coordinate regularly with Russia, as well as with others - except for the United States - on what is happening in the region. And we're open to discussing with everybody the situation in Syria, because we believe it's a common threat.

Tehran believes it's none of our business or anybody else's to decide the future of personalities in other countries.

You cannot have security at the expense of the insecurity of others.

The United States wanted to send its trained rebel groups to Syria to fight ISIS. Out of twenty-five hundred rebels they had trained, only seventy accepted to go to Syria to fight ISIS. Everybody else wanted to go to Syria to fight the government. So you've got to wake up and smell the coffee. . . . The rebel groups have not fired a shot against ISIS.

We consider ISIS and extremism to be a threat to all of us in the region. . . . Our position is that we help the legitimate governments in the region that have representation in the United Nations. We help the Iraqi government on their request through advisers; we help the Syrian government on their request to help with advisers to fight extremists. . . . So it's both lawful and legitimate.

We call upon the nuclear-weapon states to immediately cease their plans to further invest in modernizing and extending the life span of their nuclear weapons and related facilities.

The nuclear program is not the only issue dividing Iran and the US. Iran's role in the region is also creating conflicts. For example, you support the Shiite Houthi militias in Yemen whereas the US is on the side of the coalition led by Saudi Arabia.