September 3, 1941: Zyklon-B Is First Used In Auschwitz To Kill Hundreds of Russian POWs

>The tour guide told me that the room was sealed by packing dirt into the concrete well around the window outside; then the prisoners were shoved inside, Zyklon-B crystals were thrown in through the door, and the door was quickly shut. Seems like that sentence should be slightly re-written, because it reads like they were doing a live Zyklon-B demonstration during the tour