The Iranian acquisition of nuclear weapons would be infinitely more costly than any scenario you can imagine to stop it.

The greatest threat facing humanity is a radical Islamist regime meeting up with nuclear weapons.

I can tell you one thing, Iran is closer to developing nuclear weapons today than it was a week ago, or a month ago or a year ago. It's just moving on with its efforts.

We are categorically against proliferation of nuclear weapons.

A world without nuclear weapons would be less stable and more dangerous for all of us.

Today, India is a nuclear weapons state.