Rudolf Vrba, Czech Holocaust survivor and educator (born 1924)

Rudolf Vrba was a Slovak-Jewish biochemist who, as a teenager in 1942, was deported to the Auschwitz concentration camp in German-occupied Poland. He escaped from the camp in April 1944, at the height of the Holocaust, and co-wrote the Vrba-Wetzler report, a detailed report about the mass murder taking place there. The report, distributed by George Mantello in Switzerland, is credited with having halted the mass deportation of Hungary's Jews to Auschwitz in July 1944, saving more than 200,000 lives. After the war, Vrba trained as a biochemist, working mostly in England and Canada.

The Holocaust, known in Hebrew as the Shoah, was the genocide of European Jews during World War II. From 1941 to 1945, Nazi Germany and its collaborators systematically murdered some six million Jews across German-occupied Europe, around two-thirds of Europe's Jewish population. The murders were committed primarily through mass shootings across Eastern Europe and poison gas chambers in extermination camps, chiefly Auschwitz-Birkenau, Treblinka, Belzec, Sobibor, and Chełmno in occupied Poland. Separate Nazi persecutions killed millions of other non-Jewish civilians and prisoners of war (POWs); the term Holocaust is sometimes used to include the murder and persecution of non-Jewish groups.