You cannot apply your high standards to a country [Egypt] burdened with decades of autocratic rule. Our democracy is still in its infancy.

Democracy is more than a ballot box.

Its up to any government to decide how to react to the denial of basic human rights anywhere in the world, including Egypt.

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.

As long as some of us choose to rely on nuclear weapons, we continue to risk that these same weapons will become increasingly attractive to others.

Barack Obama has injected fresh momentum into efforts - stalled for a decade - to bring about nuclear disarmament.

My father taught me that you have to stand by your principles.