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.

Ukrainian President Volodymyr Zelenskyy thanked the hundreds of workers who play a vital role in Ukraine’s defense in their war with Russia. We’re learning more about the conversation between President Zelenskyy and Pennsylvania Governor Josh Shapiro.

Volodymyr Zelenskyy began his visit to the U.S. with a stop at an ammunition plant in Pennsylvania, a critical swing state that will help determine the outcome of November’s U.S.