NATO is seeking to station more troops in eastern Europe in what Reuters reports could be the biggest military buildup on Russia’s borders since the Cold War. As part of a U.S.-backed plan, NATO is planning to send battle groups to Poland, Lithuania, Estonia and Latvia with forces ranging from armored infantry to drones. This comes as tension mounts between Russia and the United States over the crisis in Syria. On Tuesday, U.S. National Intelligence Director James Clapper said he fears Russia could shoot down a U.S. aircraft if a no-fly zone were imposed over Syria.