Argentina's President Cristina Fernandez, second from left, waves to Brazil's President Dilma Rousseff, second from right, during the group photo at the United Nations Conference on Sustainable Development, or Rio+20, in Rio de Janeiro, Brazil, Wednesday, June 20, 2012. Also in the picture are France's President Francois Hollande, front row third from left, and United Nations Secretary General Ban Ki-Moon, front row right. (AP Photo/Victor R. Caivano)

Associated Press
Argentina's President Cristina Fernandez, second from left, waves to Brazil's President Dilma Rousseff, second from right, during the group photo at the United Nations Conference on Sustainable Development, or Rio+20, in Rio de Janeiro, Brazil, Wednesday, June 20, 2012. Also in the picture are France's President Francois Hollande, front row third from left, and United Nations Secretary General Ban Ki-Moon, front row right. (AP Photo/Victor R. Caivano)
Argentina's President Cristina Fernandez, second from left, waves to Brazil's President Dilma Rousseff, second from right, during the group photo at the United Nations Conference on Sustainable Development, or Rio+20, in Rio de Janeiro, Brazil, Wednesday, June 20, 2012. Also in the picture are France's President Francois Hollande, front row third from left, and United Nations Secretary General Ban Ki-Moon, front row right. (AP Photo/Victor R. Caivano)
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