[Our today's guest blogger is a German RODOH contributor who prefers to be known simply as Hans. He is a very able debunker of Holocaust deniers' claims with a keen eye for small but significant details and he employs what I would call an "exactitude" in his contributions.]
A photograph taken by the SS presumably in summer of 1943 shows the sewage treatment plant of Auschwitz-Birkenau (fig.1, 2).
