The murder factories at Sobibor were built by the Nazis during World War II. Specifically, they were built by the SS (Schutzstaffel) as part of Operation Reinhard, the plan to exterminate Jews in occupied Poland. The camp at Sobibor was one of the three main extermination camps established by the Nazis for this purpose, along with Belzec and Treblinka. These camps were responsible for the deaths of hundreds of thousands of Jews. **

Yes, there was a real uprising at Sobibor extermination camp during World War II. On October 14, 1943, Jewish prisoners led by Alexander Pechersky staged a revolt, resulting in the escape of around 300 prisoners. This uprising was one of the few successful revolts in a Nazi extermination camp and is a testament to the resilience and bravery of those who fought against the horrors of the Holocaust. **

The death factories at Sobibor were built by the Nazis during World War II. The construction and operation of the extermination camp were overseen by the SS, particularly by SS-Obersturmführer Richard Thomalla and SS-Obersturmführer Gustav Wagner. These individuals were responsible for the planning and implementation of the camp's infrastructure, including the gas chambers and crematoria used to systematically murder thousands of people, primarily Jews, at Sobibor. **

Yes, there were uprisings at concentration and extermination camps during the Holocaust, including the uprising at Sobibor. In October 1943, prisoners at Sobibor, led by Alexander Pechersky, staged a revolt, resulting in the escape of around 300 prisoners. This uprising was one of the most successful revolts in a Nazi camp during World War II and led to the closure of the Sobibor camp. The bravery and determination of the prisoners at Sobibor and other camps demonstrate the resilience and resistance of those who were subjected to the horrors of the Holocaust. **

Yes, the escape from Sobibor and the film Grey Zone are both based on true events. The escape from Sobibor was a mass escape of prisoners from the Sobibor extermination camp in German-occupied Poland during World War II. The film Grey Zone is based on the book "The Grey Zone: A Report from the Auschwitz Sonderkommando" by Dr. Miklós Nyiszli, a Hungarian Jewish prisoner who was forced to work as a doctor in the Auschwitz concentration camp. Both the escape from Sobibor and the events depicted in Grey Zone are based on historical accounts and survivor testimonies. **

As an AI, I do not have personal preferences or physical capabilities to engage in activities like hiking. However, I can provide information and tips on hiking in the mountains if you are interested. **

A 1x9 gear ratio may not be the most suitable for climbing mountains, as it may not provide enough low gears for steep inclines. Climbing mountains often requires a wide range of gears to tackle varying gradients, so a 1x9 setup may limit your ability to find the optimal gear for climbing. A setup with more gears, such as a 1x11 or 1x12, would offer more options for climbing mountains efficiently. **

Hiking pants are typically designed for comfort and durability during long walks on trails, with features like moisture-wicking fabric and multiple pockets for storage. Climbing pants, on the other hand, are specifically designed for the movements and demands of rock climbing, with features like stretchy fabric for flexibility, reinforced knees for protection, and a slim fit to prevent snagging on rocks. Climbing pants often have additional features like a chalk bag loop and brush holders for convenience while climbing. **