A Tech-Savvy Holocaust Memorial in Ukraine Draws Critics and Crowds. Monuments and Memorials (Structures), Art, Politics and Government, Holocaust and the Nazi Era, War Crimes, Genocide and Crimes Against Humanity, World War II (1939-45), Social Media, Mass Shootings, Babyn Yar Holocaust Memorial Center (Kyiv, Ukraine), Khrzhanovsky, Ilya, Kyiv (Ukraine)