Spandau Citadel, built in 1594, the 1848 St. Marien am Behnitz Catholic church designed by August Soller, and Spandau arsenal, Germany's arms development center until 1919, now a museum. That arsenal's Spandau machine gun inspired the slang "Spandau Ballet" to describe dying soldiers on barbed wire during the First World War, and later was applied to the appearance of Nazi war criminals hanged at Spandau Prison. The notorious prison, built in 1876, held Nazi war criminals after World War II until 1987, when it was demolished after the death of the last surviving prisoner, Rudolf Hess. In 1979, the English New
Inert gas asphyxiation concentration in inspired gas and blood to dangerously low levels, thereby eventually depriving all cells in the body of oxygen. According to the U.S. Chemical Safety and Hazard Investigation Board, in humans, "breathing an oxygen deficient atmosphere can have serious and immediate effects, including unconsciousness after only one or two breaths. The exposed person has no warning and cannot sense that the oxygen level is too low." In the US, at least 80 people died due to accidental nitrogen asphyxiation between 1992 and 2002. Hazards with inert gases and the risks of asphyxiation are well established. An occasional cause of