What is Gift Gas? Zyklon B is a cyanide based pesticide that was invented in Germany in the 1920's. It is infamous for it's use in the Nazi concentration camps; mass murdered in gas chambers. The gas was dropped onto the Jews, and it released a toxin, killing them very quickly.
Crematorium The crematorium was directly attached to the gas chambers, so that once everyone had been killed, workers there would pick them up and throw them in the crematorium.