the Polish Underground State reports nor the German archives reveal any such information, nor did any piece of testimony coming from wartime period or shortly thereafter mention it. The oral and written submissions Trzcińska relied on were created more than 40 years after the war, and their veracity is dubious. Moreover, retired workers of "Kolprojekt", a rail construction bureau, and available documents of the enterprise suggest that the ventilation shafts near , which supposedly were remnants of the gas chamber, were in fact built in the 1970s and that in 1960, the technical plan of Warszawa Zachodnia station did not have any gas chambers detected; known estimates of the losses Warsaw endured in World War II contradict the notion that 200,000 people could have died in the Warsaw concentration camp. Bogusław Kopka suggested that this number is in fact a sum of those who died in Warsaw Uprising, the deaths in the camps and some other civilian deaths in Warsaw. In 2010, the Institute of National Remembrance commissioned a report from historian and aerial-photography expert , which was submitted in December 2016 (it is not yet published as of August 2022). The report confirmed that the only place KL Warschau existed was on Gęsia Street and that no camp infrastructure existed in the areas said to have contained other subcamps. Walkowski also noted that the tunnels were not closed and that vehicles could drive through them, while the two ventilation shafts and a ventilator engine that were supposedly used to pump Zyklon B were only built in the 1970s. It was also shown that during the German occupation, access to the forest near Koło was not restricted for civilians, the barracks were already built in the 1930s and were used by civilians, while the purported "death wall" only emerged in 1972. Reactions According to Christian Davies, the discredited story that the Germans built a gas chamber to kill non-Jews, together with the fact of some 200,000 Polish fatalities in the 1944 Warsaw Uprising (for a total of 400,000 non-Jewish deaths in Warsaw, which is also the usual estimate of the number of Jews imprisoned in Warsaw), has been used by the story's advocates to seek parity between Jewish and non-Jewish victimhood that would make the Holocaust seem less unique, a notion that Davies dubbed the "Polocaust". He also pointed to Law and Justice party (PiS) officials' endorsement for , who