For years, US politicians have been calling Chinese telecom-equipment makers Huawei Technologies and ZTE threats to American security. But making charges about national security is a game that China can play, too. Following Edward Snowden's disclosures of US spying, the Chinese government seems eager to show American companies that they will pay a price for US government actions. That's a lesson that Microsoft and Symantec are learning now. According to reports by Bloomberg News and the Chinese media, China has instructed government departments to stop buying antivirus software by Symantec and its Moscow-based rival, Kaspersky Lab. Officially, the government's case against Microsoft is unrelated to security issues. Rather, the software giant is the subject of an antitrust investigation by the State Administration of Industry and Commerce