Since 2023, Thomas Dworzak has been traveling along the Russian border, from Finland to eastern Kazakhstan, to assess the impact of the war in Ukraine on neighboring countries: their perceptions of and relations with Russia, the influence of the United States, and the evolution of their own national security policies after the invasion. Since Winston Churchill’s famous “Iron Curtain” speech in 1946, the term has come to define the separation between Russia and the West, a way to examine the shifting ideological and geopolitical boundary between Russia and its influence on Eastern Europe, and these...