China calls Obama, Xi talks 'constructive'

By David Brunnstrom and Lesley Wroughton WASHINGTON (Reuters) - China said talks on Thursday between President Xi Jinping and U.S. President Barack Obama were constructive, even as the two sides remained far apart on the South China Sea and U.S. missile defense plans for South Korea. Meeting on the sidelines of a nuclear security summit in Washington, Xi and Obama agreed to step up cooperation to ensure nuclear security worldwide and to do more on cyber security.