U.S.-China trade tensions heated up again on Monday after Beijing issued export controls against a raft of U.S. firms, including two prominent rare-earth companies that Washington has championed in its bid for critical mineral security. China’s Commerce Ministry will now prohibit Chinese companies from exporting “dual-use” items to 10 U.S. firms it says are linked to the U.S. military in order to “safeguard national security and interests.” The move was taken in response to the U.S. Defense