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Picture dated 26 July 2006 shows former US vice-president Al Gore (L) and his wife Tipper waving to the crowd after his speech on the first day of the 2004 Democratic National Convention at the Fleet Center in Boston, Massachusetts, USA. Al Gore and the United Nations climate body the Intergovernmental Panel on Climate Change (IPCC) shared the 2007 Nobel Peace Prize, it was announced in Oslo on 12 October 2007. EPA/MATT CAMPBELL