A gas chamber is a means of execution where a poisonous gas is introduced into a hermetically sealed chamber. When the condemned breathes this gas, death follows. Hydrogen cyanide, or more rarely carbon monoxide, are the typical agents.
Gas chambers have been used for animal euthanasia in the past, but most jurisdictions no longer permit this.
The type of gas used in the Holocaust was usually hydrogen cyanide in a form called Zyklon B, but sometimes carbon monoxide (as exhaust gas).
Sometimes a box filled with anaesthetic gas is used to anaesthetize small animals for surgery.
Generally speaking, in the United States the execution protocol is as follows: First, the execution technician will place a quantity of potassium cyanide (KCN) pellets into a compartment directly below the chair in the chamber. The condemned person is then brought into the chamber and strapped into the chair, and the airtight chamber is sealed. At this point the execution technician will pour a quantity of concentrated sulfuric acid (H2SO4) down a tube that leads to a small holding tank directly below the compartment containing the cyanide pellets. The curtain is then opened, allowing the witnesses to observe the inside of the chamber. The prison warden will then ask the condemned individual if he or she wishes to make a final statement. Following this, the executioner(s) will throw a switch/lever to cause the cyanide pellets to drop into the sulfuric acid, initiating a chemical reaction that generates hydrogen cyanide (HCN) gas. The condemned individual can see the visible gas, and is advised to take a deep breath to speed unconsciousness in order to prevent unnecessary suffering. Death from hydrogen cyanide is usually painful and unpleasant, although theoretically the condemned individual should lose consciousness before dying. The chamber is then purged of the gas through special scrubbers, and must be neutralized with anhydrous ammonia (NH3) before it can be opened. Guards wearing oxygen masks remove the body from the chamber. Finally, the prison doctor examines the individual in order to officially declare that he or she is dead and release the body to the next of kin.
One of the problems with the gas chamber is the inherent danger of dealing with such a toxic gas. Ironically, the gas used to cleanse the chamber afterwards, anhydrous ammonia, is also very toxic, as is the contaminated acid that must be drained and disposed of. There have been several documented instances where undertakers have been injured because the gas was still present in the individual's body following death.
Gas chambers have been used for capital punishment in the United States in the past to execute criminals, especially convicted murderers. Five states (Wyoming, California, Maryland, Missouri, and Arizona) technically retain this method, but all allow lethal injection as an alternative. Following the videotaped execution of Robert Alton Harris a federal court in California declared this method of execution as "cruel and unusual punishment". In fact, it is highly unlikely that any of these states will ever again utilize the gas chamber, unless an inmate specifically requests to die by this method. The use of the gas chamber was also controversial because of the use of large chambers to kill millions in Nazi concentration camps. Most states have now switched to methods considered less inhumane by officials, such as lethal injection.
The first person to be executed in the United States via gas chamber was Gee Jon, on February 8, 1924 in Nevada. As of 2006, the last person to be executed in the gas chamber was German national Walter LaGrand, whom Arizona executed on March 4, 1999.
As with all judicially mandated executions in the United States, witnesses are present during the procedure. These include members of the media, citizen witnesses, prison/legal/spiritual staff, and certain family members.
Later, during the Holocaust, gas chambers were modified and enhanced to accept even larger groups as part of the Nazi policy of genocide against Jews, and others. In January or February, 1940, 250 Gypsy children from Brno in the Buchenwald concentration camp were used as guinea pigs for testing the Zyklon B (hydrogen cyanide absorbed into various solid substrates)Emil Proester, Vraždeni čs. cikanu v Buchenwaldu (The murder of Czech Gypsies in Buchenwald). Document No. UV CSPB K-135 on deposit in the Archives of the Museum of the Fighters Against Nazism, Prague. 1940. (Quoted in: Miriam Novitch, Le génocide des Tziganes sous le régime nazi (Genocide of Gypsies by the Nazi Regime), Paris, AMIF, 1968). On September 3, 1941, 600 Soviet POWs were gassed with Zyklon B at Auschwitz camp I; this was the first experiment with the gas at Auschwitz. Carbon monoxide was also used in large purpose-built gas chambers, provided by petrol or diesel engines designed for use in tanks or lorries. Nazi gas chambers in mobile vans and at least eight concentration camps (see also'' extermination camp) were used to kill several million people between 1941 and 1945; some of them could kill 2,500 people at once. The gas chambers were dismantled when Russian troops got close, except at Majdanek. The Nazis, faced with the threat of the Red Army, decided that their time would be better spent covering up their actions instead of resting and preparing for battle. The gas chamber at Auschwitz I was rebuilt after the war as a memorial, but without a door in its doorway.
A journal read that when the doors to the chamber were opened, the bodies of the dead had been clawed at and looked as though they had bitten at each other in pain and horror.
Zyklon B was used extensively in non-homicidal gas chambers at the Nazi-run concentration camps. The purpose of these gas chambers was to kill lice and other parasites. When one speaks of gas chambers at places such as Auschwitz care should be taken to distinguish between homicidal gas chambers and de-lousing gas chambers. For example the revisionist historian David Irving made a statement in his defense during a trial before an Austrian court to the effect that he now believes there were gas chambers at Auschwitz. He was more than likely splitting hairs by referring to the de-lousing gas chambers, rather than homicidal gas chambers, the existence of which he has long denied.
Holocaust | Nazi Germany | Execution methods
Gaskammer | Gaskammer (Massenmord) | Cámara de gas | Chambre à gaz | Camera a gas | תא גזים | Gaskamer | ガス室 | gasskammer | Komora gazowa | Câmaras de gás | Газовая камера | Kaasukammio | Gaskammare | 毒气室
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