Bruno Tesch was part of the team that invented what cyanide-based pesticide?
Bruno Tesch:  Together with Gerhard Peters and Walter Heerdt, he invented the insecticide Zyklon B, infamous for having been used by Nazi Germany to exterminate approximately a million of the victims of the Holocaust. Zyklon B: Zyklon B ( ; ] ; translated Cyclone B) was the trade name of a cyanide-based pesticide invented in Germany in the early 1920s.
Zyklon B