We know North Korea has the plutonium that can go into the bomb.

I have a lot of interests in global issues, as you know, humanity, inequity, arms control, and I continue to be active on all these issues.

We have no functioning parliament in Egypt and months ago Mohammed Morsi assumed legislative functions. Now he's decided that there should be no opposition to the laws that he makes and that he is authorized to pass any national security measure. It is difficult to be more absolutist than that. And the constitutional convention - what a sad gathering; it threatens to send us back to the darkest period of the Middle Ages.

Nuclear proliferation is on the rise. Equipment, material and training were once largely inaccessible. Today, however, there is a sophisticated worldwide network that can deliver systems for producing material usable in 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.

We must abandon the unworkable notion that it is morally reprehensible for some countries to pursue weapons of mass destruction, yet morally acceptable for others to rely on them for security - and indeed to continue to refine their capacities and postulate plans for their use

I feel relieved that we discovered that Iraq did not have nuclear weapons.