China on Monday accused the United States of hacking into computers at a university where, according to U.S. authorities, military research is conducted, adding to concerns by both governments about extensive online eavesdropping against each other. In June, Northwestern Polytechnic University reported computer intrusions, according to the National Computer Virus Emergency Response Center. It was stated that the center, in collaboration with a commercial security firm, Qihoo 360 Technology Co., tracked the attacks to the National Security Agency, but it was not specified how this was accomplished. China and the United States are, along with Russia, regarded as global leaders...