<a href="https://en.wikipedia.org/wiki/The_Holocaust" id="mw-g" rel="mw:WikiLink" title="The Holocaust">The Holocaust</a>: <a href="https://en.wikipedia.org/wiki/Karl_Fritzsch" id="mw-w" rel="mw:WikiLink" title="Karl Fritzsch">Karl Fritzsch</a>, deputy camp commandant of the <a href="https://en.wikipedia.org/wiki/Auschwitz_concentration_camp" id="mw_A" rel="mw:WikiLink" title="Auschwitz concentration camp">Auschwitz concentration camp</a>, experiments with the use of <a href="https://en.wikipedia.org/wiki/Zyklon_B" id="mw_Q" rel="mw:WikiLink" title="Zyklon B">Zyklon B</a> in the gassing of Soviet POWs.