>>4584303>>4584303"We're goin to cut the smoleńsk birch"
https://en.wikipedia.org/wiki/2010_Polish_Air_Force_Tu-154_crashThe thing is they (don't recall who desu) said it was caused by contact with a birch-tree. Or something along the lines. Basically, the thing cannot ever die down, there are still controversies arround it, so people contiinue to joke about it.
Also, it happened way too close to Katyń I remember seeing posters comparing those two a lot, they even drew them in elementary schools.
https://en.wikipedia.org/wiki/Katyn_massacreIt's a political manner nowadays, with our current leading party - Law and Justice (from which the president who died in the crash was) - wants to make monuments of the day and such, while some other guys say it's propaganda and they say it's not etc. etc. etc. You get the image.