Unfinished artillery shells in storage last month at the Scranton Army Ammunition Plant in Pennsylvania. (KT Kanazawich for The Washington Post) In one community churning out materiel for Kyiv’s defense, jobs and investment are flowing. For decades after coal mines and textile mills closed down, the unemployment rate here was at least two percentage points higher than the national average, said Satyajit Ghosh, a professor at the University of Scranton who studies the regional economy. Now it’s...