The content originally appeared on: CNN Mariupol, Ukraine (CNN)On the frontlines east of the port city of Mariupol, the Ukrainian army's defensive positions look much as they did two years ago: Platoons shelter in improvised bunkers and ruined houses, and trenches curl through the frigid landscape. The Russian border is less than 20 miles away. Beyond it, thousands of Russian troops have gathered, bringing with them tanks and other armor. But despite growing alarm in Washington at the prospect of […]
