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.

The future of peace and prosperity that we seek for all the world's peoples needs a foundation of tolerance, security, equality and justice. That foundation is the family. It is only by protecting families, from famine as well as from fragmentation, that they can prosper and contribute to the family of nations that is the United Nations.

There can be no doubt that these attacks are deliberate acts of terrorism, carefully planned and coordinated and as such I condemn them utterly. Terrorism must be fought resolutely wherever it appears.

I urge you to celebrate the extraordinary courage and contributions of refugees past and present.

If you have a problem and you can't find a solution, you meet again tomorrow and you keep talking until you find a solution. You can disagree with behavior or a particular position, but you do not resort to calling an opponent worthless.

In the past we could afford a long gestation period before undertaking major environmental policy initiatives. Today the time for a well-planned transition to a sustainable system is running out. We may be moving in the right direction, but we are moving too slowly. We are failing in our responsibility to future generations and even the present one.