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Kazakh President Nursultan Nazarbayev (C) walks in the Washington Convention Center, the venue of the ongoing Nuclear Security Summit, in Washington D.C., capital of the United States, April 13, 2010. [Zhang Jun/Xinhua]
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![Kazakh President Nursultan Nazarbayev (C) walks in the Washington Convention Center, the venue of the ongoing Nuclear Security Summit, in Washington D.C., capital of the United States, April 13, 2010. [Zhang Jun/Xinhua]](http://images.china.cn/attachement/jpg/site1007/20100414/000cf1bdd03f0d2f62174b.jpg "Kazakh President Nursultan Nazarbayev (C) walks in the Washington Convention Center, the venue of the ongoing Nuclear Security Summit, in Washington D.C., capital of the United States, April 13, 2010. [Zhang Jun/Xinhua]")
