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World leaders pull an all-nighter before last day of Copenhagen summit

World leaders try to rea

As the final day of the climate change summit in Copenhagen dawned on Friday, world leaders continued their efforts to reach a compromise between developed and developing countries on the issue of greenhouse gas emissions. Among those negotiating were UN Secretary-General Ban Ki-moon, German Chancellor Angela Merkel, French President Nicolas Sarkozy and US Secretary of State Hillary Rodham Clinton, who attended the summit ahead of US President Barack Obama's flight to Copenhagen on Thursday night. Upon his arrival in Denmark, Obama is slated to meet with Danish Prime Minister Lars Loekke Rasmussen, President Luiz Inacio Lula da Silva of Brazil, Russian President Dmitry Medvedev and Chinese Premier Wen Jiabao, whose country - like the United States - is a top carbon polluter.