The White House said a meeting between President Barack Obama and Chinese President Xi Jinping (shee jihn-peeng) covered hot-button topics like Syria, North Korea and cybersecurity, AP reported. Obama and Xi met Friday in St. Petersburg. As the meeting started, Obama said there will continue to be disagreements, but tensions can be managed. White House spokesman Ben Rhodes says Obama and Xi discussed North Korea's nuclear program, plus territorial disputes over the Senkaku Islands. China and the U.S. also announced they're moving ahead with efforts to phase out hydrofluorocarbons, powerful greenhouse gases blamed for global warming.