Soviet monument in Sofia, painted in the colors of the Polish and Ukrainian flags, with the signature "Katyn 5.03.1940", March 2014 About Polish tragedies: Nikita Petrov, Alexander Guryanov, Denis Volkov, Marek Radzivon, Polina Yustova-Kozhensko What do Katyn and Smolensk tragedy of the presidential aircraft mean for Poles and Russians today? Do Russians want to remember Katyn? Are all the pages of the Katyn execution read by historians, politicians and the peoples of Russia and Poland?