Poland Plane Crash Mournıng Ceremony

epa02119694 Workers prepare a stage with a giant poster showing the victims of Tupolev TU-154 plane crash at Warsaw ' s Pilsudskiego square , Poland , 16 April 2010 . Polish President Lech Kaczynski , his wife Mariaa large group of leading Polish state officialspoliticians died at the plane crash in Smolensk , Russia , on 10 April 2010 while on their way to attend ceremonies marking the 70th anniversary of the Katyn massacre .  EPA/FILIP SINGER