ha,ha, ha, ha...
Look son, the evidence is clear, there is no residual of gas found in the walls of those rooms enough to prove that gas was used to kill anyone anytime in the years of the WW2.
Plus, the windows and doors show until today big gaps in reference to their frames which would cause leaks and kill not only the dudes inside the rooms but to everyone inside the building, so, it is scientifically impossible that gas was used to kill people in those rooms because if gas was used, the gas would kill also the Germans and anything inside the entire building.
In order to accept these excellent scientific discoveries you need to erase the decades of brainwashing created by a perpetuated and systematic propaganda broadcasting around the world the lie that gas was used to kill millions of people.
The Pope must also stop following such a stupid traffic to nowhere and use science as the GPS device which will guide him to the truth, and the truth is that no gas was used in the Nazi's concentrations camps, and this truth will last until you demonstrate scientifically that gas existed and that was used.
Get over son, the fallacy is over, and the evidence obtained through the scientific method is demonstrating that all the testimonies made by assumed witness is false.
If you disagree with me, be honest with yourself and instead of calling me "denier", you must simply demonstrate that "gas didn't leak" through the gaps of the windows and doors of those rooms, something which should be greatly appreciated by everyone here reading these messages. Remember that Leutcher is an expert in this matter and that his expertize has demonstrated that the lack of insulation of those rooms is enough to discard the idea that those rooms were used as gas chambers.
Come on. I know that I am not the only one waiting to see your "science" instead of your calling names.