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The United Nations Secretary-General Ban Ki-moon walks hand in hand with the United Nations head of the UN Habitat in Nairobi, Anna Tibaijuka, right, during a visit to the Kibera Slums in Nairobi, Tuesday, Jan. 30, 2007. Ban will discuss with U.N. and Kenyan officials a possible emergency summit of world leaders aimed at breaking a deadlock over cutting greenhouse gases blamed for global warming, officials said Tuesday. (AP Photo/Sayyid Azim)
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