Peace is never a perfect achievement.

A nation has the right to defend itself, but when it comes to the broader issue of peace and security, the legitimacy rests only with the Security Council.

We have to be very clear with the population and the countries we enter what we can do and what we cannot do.

In some ways, the challenges are even more daunting than they were at the peak of the cold war. Not only do we continue to face grave nuclear threats, but those threats are being compounded by new weapons developments, new violence within States and new challenges to the rule of law.

I did not always achieve what I set out to do. Nevertheless, my personal example certainly suggests that hands-on experience can be helpful to future leaders.

Let us be good stewards of the Earth we inherited. All of us have to share the Earth's fragile ecosystems and precious resources, and each of us has a role to play in preserving them. If we are to go on living together on this earth, we must all be responsible for it.

The global HIV/AIDS epidemic is an unprecedented crisis that requires an unprecedented response. In particular it requires solidarity - between the healthy and the sick, between rich and poor, and above all, between richer and poorer nations. We have 30 million orphans already. How many more do we have to get, to wake up?