was sent to the Sobibor extermination camp on 20 December 1942, by horse-drawn cart. As an extermination camp rather than a concentration camp, Sobibor existed for the sole purpose of murdering Jews. The vast majority of prisoners were gassed within hours of arrival. Those not killed immediately were forced to assist in the operation of the camp, and few survived more than a few months. In total, some 170,000 to 250,000 people were murdered at Sobibor, making it the fourth-deadliest Nazi camp after Auschwitz, Treblinka, and Belzec. By chance, Felenbaum-Weiss managed to avoid death in the gas chamber. She recalled the event as follows:“As in a dream, I heard the voice of one of the Germans. He asked, "Does anyone know how to knit?" I stepped out of line. […] then they took me to the barracks, where I met two girls I knew: Zelda Metz and Estera Terner. When I was a child, my mother taught me how to knit socks. My job was to knit them for the Germans and iron shirts for the men of the SS.”In contrast, her brother Henryk was sent to death in the gas chambers at Sobibor upon arrival. In the months that followed, she was directed to work in the laundry and in the garden for the SS men. From this place, she watched the trains bringing prisoners to Sobibór. She described her stay in the camp as follows:“There is nothing more terrifying than feeling helpless in the face of horrific crimes that are taking place before your eyes, but you can't do anything about it. What could we girls do when we saw people being led to their deaths? Nothing."On 14 October 1943, there was a Prisoner revolt which led to the closing of Sobibor. During the uprising, she attempted to escape with Zelda Kelberman Metz, Ester Raab Terner and Abraham Margulies. They managed to hide in the forest, in a forester's hut, where they found a supply of potatoes in sacks, but hunger and cold forced them to keep moving. It is estimated that 58 people, including ten women, including Felenbaum-Weiss, survived Sobibor. Partisan activities While hiding in the nearby forests, Felenbaum-Weiss and the group she escaped with met Soviet prisoners of war who had escaped from a labor camp and helped provide food they hunted in the forest. After some time in the forest looking for a group of