Pope Francis waits to address a plenary meeting of the United Nations Sustainable Development Summit 2015 as U.N. Secretary-Gereral Ban Ki-moon speaks (top left) at United Nations headquarters in Manhattan, New York, September 25, 2015. More than 150 world leaders are expected to attend the U.N. Sustainable Development Summit from September 25-27 at the United Nations in New York to formally adopt an ambitious new sustainable development agenda a press statement by the U.N. stated REUTERS/Mike Segar