Secretary-General Ban Ki-moon (right) and Vijay Nambiar, his Chief of Staff, converse during the 2009 Commonwealth Heads of Government Meeting (CHOGM)'s Special Plenary Session on Climate Change at the Hyatt Regency Hotel in Port of Spain, Trinidad and Tobago. Mr. Ban attended the biennial Commonwealth meeting to urge world leaders' support for a legally binding climate change treaty, on the agenda at the imminent UN Climate Change Conference in Copenhagen, which kicks off on 7 December.