OTTAWA, June 30, 2016 (Xinhua) -- U.S. President Barack Obama attends a joint press conference during the North American Leaders Summit in Ottawa, Canada, on June 29, 2016. The leaders of Canada, the United States and Mexico pledged to further their cooperation in fighting against rising protectionism at the close of the North American Leaders Summit held here Wednesday. The three leaders also agreed to pledged to produce 50 percent of their countries' electricity from clean energy by 2025. (Xinhua/David Kawai)
