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American President Barack Obama (1/20/2009-1/20/2017) Argentine President Cristina Fernández de Kirchner (12/10/2007-12/10/2015) Australian Prime Minister Kevin Rudd (12/3/2007-6/24/2010) Austrian President Heinz Fischer (7/8/2004-7/8/2016) Bahamian Prime Minister Hubert Ingraham (5/4/2007-5/8/2012) Belgian Prime Minister Yves Leterme (11/25/2009-12/6/2011) Brazilian President Luiz Inácio Lula da Silva (1/1/2003-12/31/2010) British Prime Minister David Cameron (5/11/2010-7/13/2016) Canadian Prime Minister Stephen Harper (2/6/2006-11/3/2015) German President Jens Böhrnsen (5/31/2010-6/30/2010) Japanese Prime Minister Naoto Kan (6/8/2010-9/2/2011)