The international community must offer short-term emergency measures to meet critical needs. But it must also make longer-term investments to promote food production and agricultural development, enhance food security and maintain and accelerate momentum towards the MDGs.

People everywhere look to the United States to use its remarkable power to help lift humanity up and to work for the common good.

It is only natural that people's wishes and aspirations should be realized by the leaders of the region. As this wind of change blows, it is up to the leaders to seize this opportunity to look for the better future for their own people through bold reforms before it is too late, before the people are forced to take action.

The clear and present danger of climate change means we cannot burn our way to prosperity. We already rely too heavily on fossil fuels. We need to find a new, sustainable path to the future we want. We need a clean industrial revolution.

The international community cannot accept that whole communities are marginalized because of the color of their skin. People of African descent are among those most affected by racism. Too often, they face denial of basic rights such as access to quality health services and education. Such fundamental wrongs have a long and terrible history.

World military spending has now risen to over $1.2 trillion. This incredible sum represents 2.5 per cent of GDP (global gross domestic product). Even if 1 per cent of it were redirected towards development, the world would be much closer to achieving the Millennium Development Goals.

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.