A gas chamber is a method of execution that uses toxic gas to kill individuals. It is often associated with the Holocaust, where it was used by the Nazi regime to murder millions of people, including Jews and other targeted groups. The chamber is typically sealed and filled with a poisonous gas, leading to death by asphyxiation or other harmful effects. Gas chambers have also been used in some states in the United States as a form of capital punishment. The process involves the condemned person being placed in a sealed chamber, where a lethal gas is released. This method has been controversial and is less commonly used today compared to other execution methods.