"...The fall of the Berlin Wall brought new hope. But that very closeness has given rise to new dangers - dangers that cannot be contained within the borders of a country or by the distance of an ocean. [...] As we speak, cars in Boston and factories in Beijing are melting the ice caps in the Arctic, shrinking coastlines in the Atlantic, and bringing drought to farms from Kansas to Kenya. Poorly secured nuclear material in the former Soviet Union, or secrets from a scientist in Pakistan could help build a bomb that detonates in Paris. The poppies in Afghanistan become the heroin in Berlin. The poverty and violence in Somalia breeds the terror of tomorrow. The genocide in Darfur shames the conscience of us all. [...] The walls between old allies on either side of the Atlantic cannot stand. The walls between the countries with the most and those with the least cannot stand. The walls between races and tribes; natives and immigrants; Christian and Muslim and Jew cannot stand. These now are the walls we must tear down. [... ] History reminds us that walls can be torn down. But the task is never easy. True partnership and true progress requires constant work and sustained sacrifice. They require sharing the burdens of development and diplomacy; of progress and peace. They require allies who will listen to each other, learn from each other and, most of all, trust each other. [...] Now the world will watch and remember what we do here - what we do with this moment. Will we extend our hand to the people in the forgotten corners of this world who yearn for lives marked by dignity and opportunity; by security and justice? Will we lift the child in Bangladesh from poverty, shelter the refugee in Chad, and banish the scourge of AIDS in our time? Will we stand for the human rights of the dissident in Burma, the blogger in Iran, or the voter in Zimbabwe? Will we give meaning to the words "never again" in Darfur? "