The United States Coast Guard said it closely tracked Chinese polar expedition vessels transiting the Bering Sea on their way to the Arctic Ocean last week, amid unease over Beijing’s geopolitical ambitions in the region. The US Coast Guard Cutter Munro actively monitored the Chinese research ships Xuelong and Xuelong 2 as they passed northbound through the US exclusive economic zone (EEZ) and extended continental shelf in the Bering Sea towards the Arctic, the US Coast Guard said last...