SCRANTON, Pa. — Under tight security, Ukrainian President Volodymyr Zelenskyy on Sunday visited a Pennsylvania ammunition factory to thank the workers who are producing one of the most critically needed munitions for his country's fight to fend off Russian ground forces. Rep. Matt Cartwright, a Democrat who was among those who met with Zelenskyy at the Scranton Army Ammunition Plant , said the president had a simple message: “Thank you. And we need more.” The Scranton plant is one of the few