NATO officially launched its Arctic Sentry mission on February 11 in a bid to improve the military posture of the alliance in the Arctic region. The move follows recent tensions between NATO allies Denmark and the United States over the political future of Greenland. When it was first mooted last month, several diplomats told RFE/RL that a potential Arctic mission could be a way out of a growing crisis. Following a meeting between US President Donald Trump and NATO Secretary-General Mark Rutte last month in Davos, Switzerland, it was agreed that…