Jiri Kluc volunteered to help a group of Holocaust survivors living near his home in the Czech Republic when he was just 16 years old. As he helped them buy groceries and clean their homes, a few showed him the prisoner number tattoos they received at the Auschwitz death camps. They recounted the days when Nazis killed their family members, knowing they could be next at any moment. It wasn't until a few years later -- when some of those survivors died around 2018 -- that Kluc recognized how precious their stories were. "I realized that these people will be...