I'm absolutely convinced that the threat we face now, the idea of a terrorist in the middle of one of our cities with a nuclear weapon, is very real and that we have to use extraordinary measures to deal with it.

I'm absolutely convinced that the threat we face now, the idea of a terrorist in the middle of one of our cities with a nuclear weapon, is very real and that we have to use extraordinary measures to deal with it.

My greatest fear is the Iranians acquire a nuclear weapon and give it to a terrorist organization. And there is a real threat of them doing that.

It used to be you needed to have a very large sophisticated state before you could even have a nuclear weapon... Now the technology is widespread enough. It doesn't take very many people to be able to cobble together a devastating attack, and all it takes is one.

Our goal is simple: to stop Iran from obtaining a nuclear weapon.

The Russians and the Chinese have been absolutely clear they don't want to see Iran with a nuclear weapon.