“Chinese research submarines for the first time traveled thousands of feet beneath the Arctic ice this summer, a technical feat with chilling military and commercial implications for America and its allies,” the Wall Street Journal reports.“U.S. national-security officials say the Chinese undersea expeditions offer fresh evidence of a growing threat from China in the Arctic region, known as the High North. This year, Chinese military and research vessels have operated around Alaska’s Arctic waters in unprecedented numbers.”“For China, mastery of Arctic travel could yield valuable data about the natural resources awaiting below melting ice caps, significantly reduce travel time for commercial shipping and position nuclear-armed submarines closer to potential targets, including the U.S.”