The Commerce Department is tightening export controls to limit China's ability to get advanced computing chips, develop and maintain supercomputers, and make advanced semiconductors. The department said Friday that its updated export controls are focusing on these areas because China can use the chips, supercomputers and semiconductors to create advanced military systems including weapons of mass destruction; commit human rights abuses and improve the speed and accuracy of its military decision making, planning, and logistics. Commerce said the updates are part of ongoing efforts to protect U.S. national security and foreign policy interests.