1924    Capital punishment: The first state execution in the United States by gas chamber takes place in Nevada.

1942    Holocaust: 1,500 Jews are sent to gas chambers in Auschwitz.

1942    World War II: the first selections for the gas chamber at Auschwitz take place on a train full of Jews from Paris.

1957    Mass-murderer Jack Gilbert Graham is executed in Colorado by gas chamber.

1967    Luis Monge is executed in Colorado's gas chamber, in the last pre-''Furman'' execution in the United States.