Last year, on 10.04 2010 the Polish plane crashed (more info here: http://en.wikipedia.org/wiki/2010_Polish_Air_Force_Tu-154_crash)
A few days later, on 18.04 there was a funeral of Mr. President & his wife in Krakow. Someone came up with an idea of making the ‘march of memory’ and celebrations on the anniversary of that event.
The official part was quite silent, you could feel some the respect people shown. The march was political as always, with people shouting that the current government of Poland is the traitors and that they should be punished.