The New Iron Curtain: Why Poland’s Border with Belarus Matters to the U.S. Decades after the Cold War ended and the Iron Curtain fell, a new divide is emerging along Poland’s eastern border with Belarus. NATO’s most fortified border now faces joint Russian-Belarusian military drills just miles away, while Russian drones violate Polish and Romanian airspace, testing the alliance’s resolve. Just a few days ago , Ukraine talks with Russia paused, as Belarus launched major drills with Russia, while