text: U.S. President Barack Obama (2nd R) is welcomed by French President Francois Hollande (R) and (L to R) French Ecology Minister Segolene Royal, French Foreign Affairs Minister Laurent Fabius, President-designate of COP21, United Nations Secretary General Ban Ki-moon and Christiana Figueres, Executive Secretary of the UN Framework Convention on Climate Change, as he arrives for the opening day of the World Climate Change Conference 2015 (COP21) at Le Bourget, near Paris, France, November 30, 2015. REUTERS/Christian Hartmann