Title: Verschlussakte S
Subjects: Katyn Massacre, Katynʹ, Russia, 1940, Smolensk Air Disaster, 2010, Foreign relations, Flugzeugabsturz, Ursache, Ermittlung, Katyn, Massaker, Jahrestag, Aircraft accidents, Investigation, Politics and government, History
Places: Ukraine, Russia (Federation), Poland