Poland has logded a protest. the answer:
1990 Mikhail Gorbachev admitted that the NKVD had executed the Poles and confirmed two other burial sites similar to the site at Katyn: Mednoye and Piatykhatky.
other than that, many investigations show, that the sowjets did it.
i dont believe in the nürnberg-tribunal, but i do believe many sources showing, that it was a sowjet massacre
ok, so please tell me than why the resolution of Nurnberg tribunal still contains the fact that it's the Nazi Germany which executed Polish officers in than controlled territory of Katyn?