Nothing is more shameful than attacking sleeping children.

You are here to step into the shoes of UN ambassadors - to draft resolutions, to plot strategy, to negotiate with your allies as well as your adversaries. Your goal may be to resolve a conflict, to cope with a natural disaster or to bring nations together on an issue like climate change. You may be playing a role, but you are also preparing for life. You are acting as global citizens.

Now, more than ever, we need to connect the dots between climate, poverty, energy, food and water. These issues cannot be addressed in isolation.

Our atmosphere can't tell the difference between emissions from an Asian factory, the exhaust from a North American SUV, or deforestation in South America or Africa.

I am willing to take any measures when it comes to the fundamental principle of human rights.

Climate change...is, simply, the greatest collective challenge we face as a human family.

We must unite. Violence against women cannot be tolerated, in any form, in any context, in any circumstance, by any political leader or by any government.