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

The time is right for a political solution and the way is negotiations.

The simple fact is that there is a limited amount of water on the planet, and we cannot afford to be negligent in its use. We cannot keep treating it as if it will never run out.

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

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.

Managing a country is like managing a company in many ways. It maybe involves more complicated issues, but its the same skills.

No one should be put on trial without a valid reason. Former President Morsi must be treated with dignity. These are the conditions of national reconciliation.