The gravest threat faced by the world is of an extremist group getting hold of nuclear weapons or materials.

I still believe that any country understands that if they use nuclear weapons, they will be wiped out of existence. They could be irrational in many ways, but I don't think they're irrational to the point that they're ready to annihilate their own country.

I am an Egyptian Muslim, educated in Cairo and New York, and now living in Vienna. My wife and I have spent half our lives in the North, half in the South. And we have experienced first hand the unique nature of the human family and the common values we all share.

I think it is fair to say that it is under a great deal of stress, and if I am asking for significant changes, it is because the world is going through significant changes.

Well, first of all, we now have everybody with the exception of India, Pakistan, and Israel, and I dont think these three countries are going to join by simply providing them an incentive, in terms of technology.

I worry about a democracy having nuclear weapons as much as a dictatorship having nuclear weapons.

Once in a while, I have to pinch myself to remind myself I am Nobel laureate, but that is not part of my work plan every day.