Felix Kolmer was born in Prague in 1922. He was deported to Terezín ghetto on the very first transport (Ak I). From Terezín he was deported to Auschwitz-Birkenau and then to Friedland. After the war he became one of the top world experts in acoustics. In 1949, he began working for the Sound, Picture and Reproduction Technology Research Institute in Prague. He worked there until his retirement, taking also the director general´s position. On top of his scientific work, he also lectured at the Faculty of Electricity of the Czech Technical University and also at the Faculty of Music of the Academy of Fine Arts. He was also active on the board of the Foundation for Holocaust Victims and in the International Auschwitz Committee. The interview was filmed in Prague on 15th January 1996.
Miroslav Kárný was born in Prague in 1919. After graduation from a secondary school he studied at the Faculty of Arts, Charles University. He was deported to Terezín ghetto on the very first transport (Ak I). In Terezín he became one of the leading personalities in the Communist resistance movement. From Terezín he was deported to the death damp at Auschwitz-Birkenau and then to Allach, Landsberg and Kaufering. After the war he worked as a journalist. Later in life, he became very active in the field of Holocaust documentation and research. He was one of the founders of the Terezín Initiative (an organisation uniting former prisoners from Terezín ghetto) and of its Institute. The interview was recorded in Prague on 21st March 1996.