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We used to fight with Pakistan with bombs. Now we are fighting with them on the playing ground.

The nuclear arsenal that Pakistan has, I believe is secure. I think the government and the military have taken adequate steps to protect that.

For the sake of future generations, we must continue to work together to realise a world without nuclear weapons.

Pakistan has dozens of laboratories and production and storage sites scattered across the country. After developing warheads with highly enriched uranium, it has more recently tried to do the same with more-powerful and compact plutonium.

I'm a big defense hawk and a big fiscal conservative, but in this case, Pakistan continues to imprison the man who gave us Osama bin Laden and continue to have a major ideological bent within the middle echelons of their government that, I think, should cause all of us pause given the size and nature of their nuclear arsenal.

Pakistan has done some really terrible things, and yet they also have facilitated our military capabilities in ways that are critical to our country.

You've got the North Koreans building weapons; you got the Iranians building weapons. You've got - the Pakistanis already have at least 100 nuclear weapons. Do you think there's any serious effort in this country to come to grips with that?

India can live without nuclear weapons. That's our dream, and it should be the dream of the U.S. also.