Walter explains: "In this picture, you see the Star of David that Leonie and I took off when we went underground in Germany. The medal is a Bundesverdienstkreuz, the Federal Cross of Merit which is the highest honour a civilian can be awarded in Germany. I received that for my work with German youths. Every year I travel to Berlin to talk about my experiences during the Holocaust. The star and the cross of merit come from the same country, and I think they go well together."